Research review: The relationship between childhood violence exposure and juvenile antisocial behavior: a meta-analytic review

Risk and protective factors of youth crime: An umbrella review of systematic reviews and meta-analyses

INTRODUCTION

Several systematic reviews and meta-analyses have been conducted on the risk and protective factors of youth crime. This study aims to consolidate this evidence using an umbrella review methodology.

METHODS

A systematic electronic search was conducted using multiple electronic databases. Strength of associations was evaluated using quantitative umbrella review criteria, and AMSTAR was used to assess the quality of the studies.

RESULTS

Among the 58 factors identified, 11 factors were supported by highly suggestive or suggestive evidence. Evidence of association was highly suggestive (class II) for substance use (odds ratio [OR] = 2·29, 95%CI 1·58-3.01), previous history of crime (OR = 2·03, 95%CI 1·62-2·45), moral development (OR = 3·98, 95%CI 3·57-4·39), psychopathology (OR = 2·22, 95%CI 1.40-2.69), adverse childhood experiences (OR = 1·37, 95%CI = 1·36-1·38), poor parental supervision (OR = 1·85, 95%CI 1·83-1·87), maltreatment or neglect (OR = 1·34, 95%CI 1·08-1·65), attachment (OR = 1·94; 95%CI 1.93-1·95), and school bullying (OR = 2·50; 95%CI 2·03-3·08); and suggestive (class III) for peer pressure (OR = 2·11, 95%CI 2·06-2·16) and supportive school environments (OR = 0·56; 95%CI 0·55-0·57).

CONCLUSION

The evidence-based atlas of key risk and protective factors identified in this umbrella review could be used as a benchmark for advancing research, prevention, and early intervention strategies for youth crime.

School-based prevention of teacher and parental violence against children: Study protocol of a cluster-randomized controlled trial in Tanzania

BACKGROUND

Violence against children at home and at school is particularly prevalent in Africa and is associated with adverse and persistent health effects on children. The violence prevention intervention Interaction Competencies with Children - for Teachers (ICC-T) is an effective tool to reduce violence against children by fostering teachers' non-violent communication and interaction skills. To enhance these effects, in the present study, ICC-T will be extended to parents (ICC-P) aiming to increase children's experience of consistent behavior and application of non-violent discipline strategies between teachers and parents.

METHODS

To investigate the effectiveness of the school-based combined implementation of ICC-T and ICC-P, a cluster-randomized controlled trial with 16 primary schools in the urban district of Morogoro in Eastern Tanzania will be conducted. Both quantitative (structured interviews) and qualitative (focus group discussions, in-depth interviews, evaluation forms) methods will be used to investigate the effects on teachers' and parents' violence against children in home and school settings. The intervention implementation will be accompanied by a comprehensive process evaluation to assess the implementation quality of and participants' engagement with ICC-T and ICC-P. Potential downstream effects of violence reduction will be investigated by assessing the children's mental health and well-being.

DISCUSSION

The present study aims to provide evidence for the feasibility, acceptability, and effectiveness of the school-based combined implementation of ICC-T and ICC-P to reduce teacher and parental violence against children and contribute to children's well-being in home and school settings.

TRAIL REGISTRATION

The clinical trial was registered at ClinicalTrials.gov (ClinicalTrials.gov, 2024) under the identifier NCT06369025 (Hecker, Preventing Physical and Emotional Violence by Parents and Teachers in Public Schools in Tanzania (ICC-T/ICC-P_Tanz) (PreVio), 2024) on April 17, 2024.

Turning pain into strength: prosocial behaviours in coping with trauma

Background: Various coping strategies have been shown to alleviate the negative effects of trauma, yet the significance of prosocial behaviour in this realm has been notably underexplored. The present study explored the hypothesis that engaging in prosocial behaviour mitigates the impacts of trauma by promoting a sense of competence and relatedness, post-traumatic growth (PTG), and reconstruction of meaning.Methods: Three consecutive studies were conducted with college students to compare differences in consequence of prosocial behaviours between a trauma group and a control group. Study 1 (N = 96) used self-reported experiences of traumatic vs non-traumatic events; Study 2 (N = 43) used exposure vs. no exposure to video of an earthquake; Study 3 (N = 20) used a randomized controlled trial (RCT) of a prosocial-themed intervention vs. no intervention. Outcomes in all studies were assessed by self-report questionnaires.Results: Trauma damaged participants' sense of competence and meaningfulness. Prosocial behaviour relieved the impact of trauma on meaning, specifically manifested in the individuals' sense of meaningfulness and their search for meaning. Group interventions with a prosocial theme (based on effect size results) reduced post-traumatic stress disorder (PTSD) and enhanced PTG in victims. The promoting effect on PTG persisted a month later, and its enhancing effect on meaning manifested with a delay.Conclusion: Prosocial behaviour can potentially serve as a beneficial strategy for individuals coping with trauma because it helps enhance meaning and promotes PTG in victims. This conclusion is supported by laboratory experiments and a tentative small-scale intervention study, which provide an innovative perspective for future trauma interventions.

Interventions to Prevent and Respond to Violence Against Justice-Involved Young Women: A Scoping Review

Young women who have had contact with the criminal justice system (justice-involved young women) have an increased risk of being a victim of violence. However, no reviews have synthesized the evidence on interventions to prevent or respond to violence against justice-involved young women. We conducted a scoping review to identify interventions designed to prevent or respond to violence against justice-involved young women. We searched Medline, Criminal Justice Abstracts, Web of Science, and Google Scholar for peer-reviewed and gray literature published in English from January 1, 2000 until March 23, 2021. Consistent with the public health approach to violence, we included primary, secondary, and tertiary interventions. Excluding duplicates, our search returned 5,603 records, 14 of which met our inclusion criteria. We narratively synthesized the included studies, all of which were conducted in the United States. Most included studies examined a tertiary intervention (n = 10), and few examined a primary (n = 2) or secondary (n = 2) intervention. Across the Joanna Briggs Institute Critical Appraisal Tools, the percentage of items met ranged from 0% to 78%. There was some limited evidence that tertiary interventions that included cognitive behavioral therapy reduced the mental health impacts of violence victimization among justice-involved young women. There was little evidence on primary and secondary interventions. Effective and evidence-based interventions to prevent violence victimization and revictimization against justice-involved young women remains a critical gap in knowledge.

Disclosure of Exposure to Violence in Urban Adolescents

Research has documented high rates of exposure to violence in urban African American adolescents together with their negative effects on psychosocial adjustment. Coping with violence exposure may be facilitated by disclosure of these experiences to others, but little is known about the extent to which youth disclose their various experiences with violence. This study examined the prevalence of disclosure of violence experienced as a witness or victim in different contexts or locations to parents, friends, siblings, teachers, counselors, and relatives. Urban African American adolescents from Southeastern U.S. were interviewed at three time points (N = 81; average ages 13.3, 16.1, and 17.8). Across the three time points, 90% to 91% witnessed violence and 64% to 81% were victimized in the last year. Of these youth, 40% to 53% disclosed experiences of witnessing violence and 29% to 52% disclosed experiences of victimization. The results showed that disclosure of violence most often involved parents and friends, with fewer youth disclosing to teachers and counselors. Disclosure of violence victimization increased from early to late adolescence. Experiences of dating violence victimization were less likely to be disclosed by adolescents, especially among males. These findings support the need for more research on adolescents' disclosure of violence exposure and its links to adjustment, with implications for interventions aimed at improving coping in youth exposed to violence.

Childhood maltreatment and parenting style associated school bullying in Chinese children and adolescents: An analytical epidemiology evidence

OBJECTIVE

The independent associations among childhood maltreatment (CM), parenting style, and school bullying in children and adolescents have not been adequately discussed. Epidemiological evidence of higher quality is still scarce. We intend to investigate this topic by using a case-control study design in a large sample of Chinese children and adolescents.

METHOD

Study participants were chosen from the Mental Health Survey for Children and Adolescents in Yunnan (MHSCAY), a mega ongoing cross-sectional study. The combined database from four study sites was used. The population-based case-control study was individually matched by study site, age, sex, race, left-behind status, whether a single child, and whether a boarding student.

RESULTS

Cases were observed to have a significantly higher prevalence of CM, higher scores for parental rejection and over-protection, and lower scores for parental emotional warmth. Multiple conditional logistic regression revealed that CM, especially emotional abuse (EA) and sexual abuse (SA), were associated with a prominently increased risk of school bullying involvement, with adjusted odds ratio (OR) of 2.28 (95 % CI: 2.03, 2.57) and 1.90 (95 % CI: 1.67, 2.17). Subsequent analysis further corroborated the robustness of EA-bullying and SA-bullying associations. Although parenting style generally showed a weaker association with school bullying, a higher level of parental rejection was related to an increased risk of bullying victimization.

CONCLUSIONS

Chinese children and adolescents who are victims of EA or SA, or experienced a higher level of parental rejection, are more vulnerable to school bullying. Targeted interventions should be designed and implemented.

Community Violence Exposure and Stress Reactivity in African American and Non-Latino White Adolescents With Overweight/Obesity

Adolescents who experience community violence are exposed to toxic stressors at a critical period of growth and development. The purpose of this study was to examine the relationship between community violence exposure and stress reactivity in African American and non-Latino white adolescents with overweight/obesity. Fifty-one adolescents (47% female, 55% African American; aged 14-19) participated in this study. Community violence was assessed using the Survey of Children's Exposure to Community Violence. Stress reactivity was assessed via salivary cortisol and alpha-amylase area under the curve (AUC) during a Trier Social Stress Test (TSST). Race was a significant predictor of alpha-amylase reactivity (β = 10740±3665, p = 0.0006), with a higher alpha-amylase AUC observed in African American compared to non-Latino white adolescents. There was also a significant difference in the relationship between community violence exposure and alpha-amylase AUC by race (β = -3561±1226, p = 0.007). At similar increases in violence exposure, African Americans demonstrated a significant decline in alpha-amylase AUC while non-Latino whites demonstrated a significant increase in alpha-amylase AUC. Neither race nor violence exposure were significant predictors of cortisol AUC and there were no significant differences in the relationship between community violence exposure and cortisol AUC by race (all p's > .05). These preliminary findings suggest exposure to community violence may act to exacerbate autonomic dysregulation in African American adolescents with overweight/obesity. Longitudinal studies are needed to confirm the mechanisms by which community violence exposure differentially impacts stress responses by race.

Juvenile confinement exacerbates adversity burden: A neurobiological impetus for decarceration

Every year, about 700,000 youth arrests occur in the United States, creating significant neurodevelopmental strain; this is especially concerning as most of these youth have early life adversity exposures that may alter brain development. Males, Black, and Latinx youth, and individuals from low socioeconomic status households have disproportionate contact with the juvenile justice system (JJS). Youth confined in the JJS are frequently exposed to threat and abuse, in addition to separation from family and other social supports. Youths’ educational and exploratory behaviors and activities are substantially restricted, and youth are confined to sterile environments that often lack sufficient enrichment resources. In addition to their demonstrated ineffectiveness in preventing future delinquent behaviors, high recidivism rates, and costs, juvenile conditions of confinement likely exacerbate youths’ adversity burden and neurodevelopmentally harm youth during the temporally sensitive window of adolescence. Developmentally appropriate methods that capitalize on adolescents’ unique rehabilitative potential should be instated through interventions that minimize confinement. Such changes would require joint advocacy from the pediatric and behavioral health care communities. “The distinct nature of children, their initial dependent, and developmental state, their unique human potential as well as their vulnerability, all demand the need for more, rather than less, legal and other protection from all forms of violence (United Nations Committee on the Rights of the Child, 2007).”

Childhood Maltreatment, Blood Lead Levels, and Crime and Violence: A Prospective Examination

BACKGROUND

Research has shown that maltreated children are at increased risk for subsequent crime and violence and are more likely to reside in neighborhoods with a high likelihood of lead exposure. Other literature has reported associations between childhood lead exposure and antisocial and criminal behavior. Little is known about the relationships among childhood maltreatment, adult lead exposure, and crime and violence.

METHODS

As part of a prospective longitudinal study of the long-term consequences of childhood maltreatment, children with documented histories of abuse and neglect and demographically matched control children (ages 0-11 years) were followed into adulthood and interviewed. Participants included 556 individuals who had valid blood lead level (BLL) measures at a mean age of 41.2 years. Participants had a mean age of 50.5 (SD = 3.53) years at the time of the last criminal history check used to determine the number of arrests.

RESULTS

Childhood maltreatment predicted a higher number of arrests for any crime and any violence after the blood was collected but not higher BLLs in adulthood. There were significant paths from adult BLLs to arrests after the blood was collected, despite controlling for age, sex, race, and IQ and the inclusion of individual- and neighborhood-level socioeconomic status, and paths from neighborhood socioeconomic status to higher BLLs in models predicting any arrest and any violent arrest after the blood was collected.

CONCLUSIONS

These findings demonstrate how environmental toxins such as lead can affect outcomes in adulthood, including crime, and provide evidence that links neighborhood disadvantage to higher BLLs in adulthood.

An investigation into the association between cannibalism and serial killers

The aim of the current study was to compare and contrast non-cannibalistic and cannibalistic serial killers. Using case study data, the present study assessed common patterns among the life histories of cannibalistic serial killers compared to those of a control sample of serial killers that did not commit cannibalism. These include but are not limited to childhood experiences, socio-economic status, biological abnormalities and life events. Results indicated that factors that may differentiate cannibals from non-cannibals likely result from childhood influences, rather than influences at the time of the kill. Findings may be used to identify potential warning signs or triggers for cannibalistic behaviour.

The Protective Effect of Neighbourhood Collective Efficacy On Family Violence and Youth Antisocial Behaviour in Two South Korean Prospective Longitudinal Cohorts

Neighbourhood collective efficacy has been proposed as a protective factor against family violence and youth antisocial behaviour. However, little is known about its impact on parent and child behaviour in non-Western countries. Using data from two population-based prospective cohorts from South Korea, including primary school students aged 10-12 years (N = 2844) and secondary school students aged 15-17 years (N = 3449), we examined the interplay between collective efficacy, family violence, and youth antisocial behaviour, and whether effects vary by SES. In a first series of models, in both samples, higher levels of collective efficacy were associated with lower levels of family violence, whereas higher levels of family violence were associated with higher levels of youth antisocial behaviour. There was no direct effect of collective efficacy on youth antisocial behaviour; however, there was an indirect effect via family violence. Although these effects were more pronounced in low SES children, there was no evidence of moderation by SES. In a second series of models, in primary school students, collective efficacy was not associated with youth antisocial behaviour. However, there was a direct effect of collective efficacy on family violence, even after adjusting for youth antisocial behaviour. Again, there was no evidence of moderation by SES. In secondary school students, the pattern of results was less consistent, however, again, suggesting more pronounced effects of collective efficacy in low SES children. The findings suggest that collective efficacy may influence family violence more directly, whereas youth antisocial behaviour may be affected more indirectly through the family environment.

Suicidal behaviour in Aboriginal and non-Aboriginal young men under custodial youth justice supervision: understanding the role of adverse childhood experiences

This study examined the association between adverse childhood experiences (ACEs) and suicidal behaviour in a sample of 1726 young men in an Australian youth justice detention population. Nine ACEs, including child abuse and parental risk factors, were examined. Analyses focused on whether ACEs were associated with suicidal ideation and attempts after controlling for other known correlates including substance use, aggression and out-of-home care exposure. Aboriginal and Torres Strait Islander young men were found to have a higher prevalence and a higher average score of ACEs, but differed very little in relation to reported suicidal behaviour. Higher ACEs scores and specific maltreatment types (i.e. physical and sexual abuse) were positively associated with suicidal behaviour. This relationship was attenuated after controlling for established correlates of suicidal behaviour. The findings underscored the importance of understanding ACEs as major risk factors for suicide in youth justice populations and the need for effective prevention measures.

The global impact of adverse childhood experiences on criminal behavior: A cross-continental study

BACKGROUND

Adverse Childhood Experiences (ACEs) have been associated with a greater risk of later criminal offending. However, existing research in this area has been primarily conducted in Western developed countries and cross-cultural studies are rare.

OBJECTIVES

This study examined the relationship between ACEs and criminal behaviors in young adults living in 10 countries located across five continents, after accounting for sex, age, and cross-national differences.

PARTICIPANTS AND SETTING

In total, 3797 young adults aged between 18 and 20 years (M = 18.97; DP = 0.81) were assessed locally in community settings within the 10 countries.

METHOD

The ACE Questionnaire was used to assess maltreatment and household dysfunction during childhood and a subset of questions derived from the Deviant Behavior Variety Scale (DBVS) was used to determine past-year criminal variety pertaining to 10 acts considered crime across participating countries.

RESULTS

Physical and sexual abuse, physical neglect, and household substance abuse were related to criminal variety, globally, and independently across sexes and countries ranked differently in the United Nations Human Development Index (HDI). In addition, three out of five experiences of household dysfunction were related to criminal variety, but subsequent analyses indicate that some forms of household dysfunction only hold statistical significance among males or females, or in countries ranking lower in the HDI.

CONCLUSIONS

This research strengthens the finding that there are cross-cultural mechanisms perpetuating the cycle of violence. It also indicates that forms of household dysfunction have an impact on criminal behavior that is shaped by gender and the country's levels of social well-being.

Parental perceived immigration threat and children's mental health, self-regulation and executive functioning in pre-Kindergarten

Many children in immigrant households endure unique stressors shaped by national, state, and local immigration policies and enforcement activity in the United States. Qualitative studies find that during times of heightened immigration enforcement, children as young as 3 years of age show signs of behavioral distress related to national anti-immigrant sentiment and the possibility of losing a parent. Using multiple sources of data from 168 racially and ethnically diverse families of children in pre-Kindergarten, the present study examined variability in perceived levels of immigration enforcement threat by parental immigrant status and ethnicity. This study examined associations between immigration enforcement threat and child mental health, self-regulation, and executive functioning and whether parent immigrant status or child gender moderates these associations. We found substantial variability in perceived immigration threat, with immigrant parents and Latinx parents reporting significantly greater levels of immigration threat compared to nonimmigrant parents and non-Latinx parents. Immigration enforcement threat was associated with greater child separation anxiety and overanxious behaviors, and lower self-regulation among boys and girls and among children of immigrant and U.S.-born parents. In contrast to our hypothesis, immigration enforcement threat was associated with higher self-regulation according to independent assessor ratings. Educators and healthcare providers working with young children from immigrant and Latinx households should be aware of the disproportionate stress experienced by immigrant and Latinx families due to a xenophobic sociopolitical climate marked by heightened immigration enforcement threat and racist, anti-immigrant rhetoric. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Diverse Long-Term Effects of Childhood Exposure to Intimate Partner Violence: Development of Externalizing Behaviors in Males and Females

Using data from all three waves of the Project on Human Development in Chicago Neighborhoods (PHDCN) longitudinal cohort study, this article examined the long-term effects of intimate partner violence (IPV) exposure during childhood and early adolescence on subsequent externalizing behaviors (i.e., delinquency, violence, and drug offenses). A propensity score matching (PSM) was employed to match a group of individuals reporting childhood/adolescence IPV exposure to those not exposed to IPV on key variables. Longitudinal latent class analyses (LLCA) were then utilized to estimate the longitudinal developmental trajectories of externalizing behaviors separately for the IPV- and non-IPV-exposed males and females and compared with each other. PSM revealed that there were small but significant differences in mean levels of externalizing behaviors between IPV-exposed and non-IPV-exposed youth at Waves 2 and 3. Furthermore, LLCA indicated that there were three distinct developmental trajectories of externalizing behaviors among the IPV-exposed males but four distinct developmental trajectories of externalizing behaviors among the IPV-exposed females, non-IPV-exposed males, and non-IPV-exposed females. Overall, the IPV-exposed males had the largest number of life-course-persistent offenders as well as adolescents who started their offending at a very early age but rapidly declined by the end of the study period. However, the non-IPV-exposed males', albeit smaller, life-course-persistent group displayed by far the highest levels of externalizing behaviors of the entire sample. Females in the present study were largely similar to each other in the development of externalizing behaviors, regardless of IPV exposure. Policy implications are discussed.

A multilevel examination of lifetime aggression: integrating cortical thickness, personality pathology and trauma exposure

Aggression represents a significant public health concern, causing serious physical and psychological harm. Although many studies have sought to characterize the etiology of aggression, research on the contributions of risk factors that span multiple levels of analysis for explaining aggressive behavior is lacking. To address this gap, we investigated the direct and unique contributions of cortical thickness (level 1), pathological personality traits (level 2) and trauma exposure (level 3) for explaining lifetime physical aggression in a high-risk sample of community adults (N = 129, 47.3% men). First, the frequency of lifetime aggression was inversely associated with cortical thickness in regions of prefrontal and temporal cortices that have been implicated in executive functioning, inhibitory mechanisms and socio-emotional processing. Further, aggression was positively associated with pathological personality traits (antagonism and disinhibition) and exposure to assaultive trauma. Notably, all three levels of analysis (cortical thickness, pathological personality traits and assaultive trauma exposure) explained non-overlapping variance in aggressive behavior when examined simultaneously in integrative models. Together, the findings provide a multilevel assessment of the biopsychosocial factors associated with the frequency of aggression. They also indicate that cortical thickness explains novel variance in these harmful behaviors not captured by well-established personality and environmental risk factors for aggression.

Exploring how children subjected to violence in the home cope with experiences in Secure Training Centres

BACKGROUND

Violence in the home is recognised as a significant problem, with around 29.5 % of children subjected to violence in the home at some point in the United Kingdom (Radford et al., 2013). Children in custodial environments are a particularly vulnerable group in society (McAra & McVie, 2010), with 51 % of the children in Secure Training Centres subjected to violence in the home (Paterson-Young, 2018).

OBJECTIVE

The purpose of this paper is to explore how children subjected to violence in the home cope with violence and experiences with restraint in Secure Training Centres.

PARTICIPANTS AND SETTING

The research was conducted with children and staff in a Secure Training Centre that accommodates boys aged between 12 and 18 years-old in England.

METHODS

Thematic analysis was used to analyse secondary data, originally collected by the author, from semi-structured interviews with children (N = 15) and staff (N = 15) in Secure Training Centres. It led to the identification of four themes: 'Struggling to cope with abuse', 'Substance use as a coping mechanism', 'Disjointed service delivery' and 'Mirroring violence in the home through normalised restraint'.

RESULTS

The findings illustrate that children in custodial environments who have experienced violence in the home are subjected to violent behaviour management techniques in custody, mirroring their experiences in the home. This normalised violence inhibits the development of positive coping mechanisms, relationships, and attitudes towards violence.

CONCLUSIONS

Enhancing our understanding of 'what works' in supporting children subjected to violence allows for the development of effective and sustainable services founded on collaboration, violence reduction, and trauma-informed practices.

Exploring the Impact of Child Maltreatment and Interparental Violence on Violent Delinquency in an International Sample

Young people are exposed to violence regularly in their homes, schools, and communities. Such exposure can cause them significant physical, mental, and emotional harm, with long-term effects lasting well into adulthood. Of particular concern is violence within the family, where children are victimized by their parents. Research shows that direct and indirect childhood exposure to violence and maltreatment within the family increases the risk of subsequent violent delinquent behavior. Social learning theory and attachment theory place parenting at the center of the "cycle of violence," and "intergenerational transmission of violence" claims that experiencing violence in childhood will lead to the perpetration of violence in adolescence. Although much research has been done, these assertions have never been tested on a large international sample of young people. The current article fills this void by analyzing surveys completed by 57,892 students who were 12 to 16 years old from 25 countries as part of the International Self-Report Delinquency Study (ISRD3). Structural equation modeling (SEM) is used to test the direct and indirect effects of child maltreatment and interparental violence on self-reported violent delinquency. Mediating effects are proposed for attachment to parents, parental social control (measured by parental knowledge, parental monitoring, and child disclosure), and parental moral authority. Analysis suggests direct effects of child maltreatment and interparental violence, as well as mediating effects of parental monitoring, parental knowledge, and parental moral authority. Child disclosure and attachment to parents do not affect violent juvenile offending. Being a victim of both child maltreatment and interparental violence is found to exacerbate the effect on violent offending. The results support the cross-national generalizability of the "cycle of violence" argument that children tend to reproduce the behavior of their parents.

Amygdala Allostasis and Early Life Adversity: Considering Excitotoxicity and Inescapability in the Sequelae of Stress

Early life adversity (ELA), such as child maltreatment or child poverty, engenders problems with emotional and behavioral regulation. In the quest to understand the neurobiological sequelae and mechanisms of risk, the amygdala has been of major focus. While the basic functions of this region make it a strong candidate for understanding the multiple mental health issues common after ELA, extant literature is marked by profound inconsistencies, with reports of larger, smaller, and no differences in regional volumes of this area. We believe integrative models of stress neurodevelopment, grounded in "allostatic load," will help resolve inconsistencies in the impact of ELA on the amygdala. In this review, we attempt to connect past research studies to new findings with animal models of cellular and neurotransmitter mediators of stress buffering to extreme fear generalization onto testable research and clinical concepts. Drawing on the greater impact of inescapability over unpredictability in animal models, we propose a mechanism by which ELA aggravates an exhaustive cycle of amygdala expansion and subsequent toxic-metabolic damage. We connect this neurobiological sequela to psychosocial mal/adaptation after ELA, bridging to behavioral studies of attachment, emotion processing, and social functioning. Lastly, we conclude this review by proposing a multitude of future directions in preclinical work and studies of humans that suffered ELA.

The comparative and cumulative impact of different forms of violence exposure during childhood and adolescence on long-term adult outcomes

Violence exposure during childhood and adolescence is associated with a range of negative psychosocial outcomes. Research examining the impact of violence exposure has been limited by the compartmentalization into separate bodies of research (e.g., community violence, domestic violence). There is also a paucity of research examining long-term adult outcomes. Using a large and racially diverse sample (n = 754; male = 58%; Black = 46%), the current longitudinal study aimed to elucidate the comparative and cumulative effect of different types of violence exposure (witnessing vs. victimization) across different locations (home, school, neighborhood) in childhood and adolescence (lifetime through Grade 8) on long-term internalizing, externalizing, and attention problems; substance use; and intimate partner violence in adulthood (age 25). Victimization, but not witnessing violence, predicted all five adult outcomes. Specifically, being victimized at home was associated with the widest range of negative outcomes (internalizing, externalizing, and attention problems), while school victimization was associated with substance use. Further, when youth experienced multiple types of violence across multiple locations (cumulative violence exposure), they experienced a more diverse range of negative outcomes in adulthood (composite score). The current study highlights the stronger effects of violence exposure in more proximal contexts, and how these locations are important for emotional and behavioral development.

Associations between developmental timing of child abuse and conduct problem trajectories in a UK birth cohort

BACKGROUND

Although there is strong evidence for a relationship between child abuse and neglect and conduct problems, associations between child abuse experienced at different developmental stages and developmental trajectories of conduct problems have not been examined. We sought to investigate effects of timing of child abuse on conduct problem trajectories in a large UK birth cohort study.

METHODS

We applied latent class growth analysis to identify conduct problem trajectories in the Avon Longitudinal Study of Parents and Children, using parent-rated conduct problems from ages 4-17 years (N = 10,648). Childhood-only and adolescence-only abuse, in addition to abuse in both developmental periods ('persistent' abuse), were assessed by retrospective self-report at age 22 years (N = 3172).

RESULTS

We identified four developmental trajectories: early-onset persistent (4.8%), adolescence-onset (4.5%), childhood-limited (15.4%), and low (75.3%) conduct problems. Childhood-only abuse and 'persistent' abuse were associated with increased odds of being on the early-onset persistent and adolescence-onset conduct problem trajectories compared to the low conduct problems trajectory. Adolescence-only abuse was not predictive of trajectory membership. There were no associations between abuse and childhood-limited trajectory membership.

CONCLUSIONS

Early-onset persistent and adolescence-onset conduct problems showed similar patterns of association with abuse exposure, challenging developmental theories that propose qualitative, as opposed to quantitative, differences in environmental risk factors between these trajectories. The results also highlight that childhood-only and 'persistent' abuse were more strongly linked to elevated conduct problem trajectories than adolescence-only abuse, and that 'persistent' abuse is particularly detrimental.

A Bad Start: The Combined Effects of Early Onset Substance Use and ADHD and CD on Criminality Patterns, Substance Abuse and Psychiatric Comorbidity among Young Violent Offenders

Substance abuse, conduct disorder (CD) and attention deficit/hyperactivity disorder (ADHD) are all known risk factors for developing aggressive behaviors, criminality, other psychiatric comorbidity and substance use disorders (SUD). Since early age of onset is important for aggravating the impact of several of these risk factors, the aim of the present study was to investigate whether young adult violent offenders with different patterns of early onset externalizing problems (here: substance use < age 15, ADHD, CD) had resulted in different criminality profiles, substance use problem profiles and psychiatric comorbidity in young adult age. A mixed-method approach was used, combining a variable-oriented approach (with Kruskal Wallis tests) and a person-oriented approach (with Configural frequency analysis). Overall, this combined approach indicated that persons with combined ADHD+CD and persons with CD + early onset of substance use had a more varied history of violent crimes, a more comprehensive history of aggressive behaviors in general, and more psychiatric comorbidity, as well as more varied SUD and destructive substance abuse in adult age, than persons without ADHD, CD or early SU. Results are in line with previous variable-oriented research, but also indicate that individuals in this group with heavy problem aggregation early in life have a wider spectrum of problems in young adult age. Importantly, among these young violent offenders, problem aggregation was the overwhelming norm, and not the exception, as in studies of the general population. This emphasizes the need for early coordinated interventions, but also that treatment within correctional facilities in adult age needs to be comprehensive and take individual patterns of comorbidity into account.

Childhood Maltreatment and Violent Outcomes: A Systematic Review and Meta-Analysis of Prospective Studies

The risk of violence following childhood maltreatment is uncertain. This meta-analytic review identified prospective studies that have examined this association. We systematically searched three electronic databases (PsycINFO, EMBASE, and MEDLINE) and completed a targeted search on Google Scholar. These were supplemented with scanning reference lists and correspondence with authors. We considered non-English-language and unpublished studies. Studies were included if childhood maltreatment was measured before age 18 years and occurred before violent outcomes. We identified 18 eligible studies with data on 39,271 participants. We conducted meta-analysis to calculate odds ratios (ORs) using random-effects models. Heterogeneity was explored through subgroup analyses and meta-regression. The overall OR of violent outcomes in childhood maltreatment was 1.8 (95% confidence interval [1.4, 2.3]) with substantial heterogeneity (I2 = 92%). Meta-regression suggested that risk of violence following childhood maltreatment was more elevated in samples with higher percentage of females, in higher quality investigations, in studies with case-linkage methods compared to that followed-up participants over time using a prospective cohort design, when general population or matched controls were used rather than selected population controls, and when violent outcomes were ascertained in older individuals. In conclusion, the risk of later violence perpetration was modestly increased in individuals with a history of childhood maltreatment. Preventative strategies and interventions for childhood maltreatment may have an important role in violence reduction. Methodological issues and recommendations for future research are discussed.

A Systematic Review of Reviews of the Outcome of Noninstitutional Child Maltreatment

The aim of the systematic review described in this article was to synthesize available high-quality evidence on the outcomes of noninstitutional child maltreatment across the life span. A systematic review of previous systematic reviews and meta-analyses was conducted. Ten databases were searched. One hundred eleven papers which met stringent inclusion and exclusion criteria were selected for review. Papers were included if they reported systematic reviews and meta-analyses of longitudinal or cross-sectional controlled studies, or single-group cohort primary studies of the outcomes of child maltreatment in the domains of physical and mental health and psychosocial adjustment of individuals who were children lived mainly with their families. Using AMSTAR criteria, selected systematic reviews and meta-analyses were found to be of moderate or high quality. Searches, study selection, data extraction, and study quality assessments were independently conducted by two researchers, with a high degree of interrater reliability. The 111 systematic reviews and meta-analyses reviewed in this article covered 2,534 independent primary studies involving 30,375,962 participants, of whom more than 518,022 had been maltreated. The magnitude and quality of this evidence base allow considerable confidence to be placed in obtained results. Significant associations were found between a history of child maltreatment and adjustment in the domains of physical health, mental health, and psychosocial adjustment in a very wide range of areas. The many adverse outcomes associated with child maltreatment documented in this review highlight the importance of implementing evidence-based child protection policies and practices to prevent maltreatment and treat child abuse survivors.

Association Analysis of Monoamine Oxidase-A Gene Promoter Polymorphism (MAOA uVNTR) for Antisocial Behavior: Absence of the Counting Number Repeats in Central Iran

Background: The MAOA gene is located on the X chromosome (Xp11.23). Several studies have established a VNTR (Variable Number Tandem Repeat) polymorphism in the upstream of the MAOA gene transcriptional initiation region named uVNTR which is correlated with the risk of antisocial behavior. Objectives: This study aimed to investigate the association between MAOA genotypes and the risk of violent behavior in a cohort of violent and age-matched non-violent individuals. Methods: In the current case-control study, MAOA uVNTR was genotyped in a cohort of 88 violent and 95 age-matched non-violent individuals. Individuals were genotyped for the MAOA uVNTR by performing PCR, gel electrophoresis, and sequencing. Furthermore, a chi-square test was performed using SPSS, and a p-value of less than 0.05 was considered statistically significant. Results: We identified three MAOA uVNTR allelic variants: They were harboring 3.5, 4.5, and 5.5 repeated sequences. Alleles with 2, 3, 4, 5, and 6 repeats were not observed in any of the two examined groups. Conclusions: We did not detect a statistically appreciable association between antisocial behavior and allele frequencies in the studied population in central Iran.

Exploring the Overlap Between Sexual Victimization and Offending Among Young Women Across Neighborhoods: Does the Type of Force and Type of Offending Matter?

The relationship between victimization and subsequent maladaptive behaviors such as offending is well established. To a lesser degree, a contextual lens has been used to examine how neighborhood characteristics influence the overlap between victimization and offending. The existing literature has yet to explore how the neighborhood context moderates the victim-offender overlap among young women, specifically, or whether the type of force used during sexual victimization or offending matters. This study uses data from The National Longitudinal Study of Adolescent to Adult Health (Add Health) to examine whether concentrated disadvantage moderates the impact of sexual victimization on subsequent offending for women. Results indicate that young women who experience sexual victimization are more likely to engage in general offending regardless of neighborhood type. However, closer examination reveals that, when taking into account the type of force used in sexual victimization (physical or coerced) and the type of offending (violent, property, drug use), the overlap does indeed vary across neighborhoods. Specifically, results indicate that only coerced sexual victimization significantly affects property offending in neighborhoods with high levels of concentrated disadvantage. Related to violent offending, physical sexual victimization has a strong positive impact in less disadvantaged neighborhoods. Finally, coerced sexual victimization is significantly associated with an increased likelihood for drug use, and this relationship is consistent across neighborhoods. The findings suggest that nuances in the nature of victimization and offending need to be taken into account to fully understand the victim-offender overlap across neighborhood context.

Child maltreatment and the risk of antisocial behaviour: A population-based cohort study spanning 50 years

BACKGROUND

Child maltreatment is associated with an increased risk of antisocial behaviour; however, whether this risk persists and remains stable across the life-course is undetermined.

OBJECTIVE

To examine associations between chid maltreatment and antisocial behaviour across the life-course.

PARTICIPANTS AND SETTING

The study used 50 years of longitudinal data from the 1958 British birth cohort (n = 8088) measuring child neglect (prospectively) and abuse (retrospectively) and antisocial behaviour from childhood-to-adulthood.

METHODS

Latent growth curve models analysed the longitudinal course of antisocial behaviour across childhood (7-16years) and adulthood (23-50years) as a function of child maltreatment. We used directed acyclic graphs to identify, and adjust for, potential confounders (biological, family, social).

RESULTS

Child maltreatment was associated with higher levels of antisocial behaviour at all seven timepoints across the life-course (7-50years). Antisocial behaviour was elevated during childhood and adulthood in individuals who were maltreated, independently of confounding factors. Individuals who experienced multiple types of maltreatment were at the greatest risk of antisocial behaviour. Each additional maltreatment type was associated with an increased risk during both childhood (B = 0.173; SE = 0.024; p < .001) and adulthood (B = 0.137; SE = 0.014; p < .001). There was limited evidence that child maltreatment was associated with within-person rates of change, indicating that the increased risk of antisocial behaviour did not change over time.

CONCLUSIONS

Child maltreatment is associated with an increased risk of antisocial behaviour, with a persistent and stable association remaining up to age 50. Our results highlight the burden of child maltreatment and the importance of providing long-term support for individuals who experience child maltreatment.

Female Prisoners in Spain: Adverse Childhood Experiences, Negative Emotional States, and Social Support

A growing body of literature on correctional populations from the past two decades indicates that a significant proportion of prison inmates report experiencing adverse childhood experiences (ACEs) during childhood. Extant literature also suggests that women suffer disproportionate victimization at all life stages. The current study examines the prevalence and magnitude of the associations between ACEs, social support, and negative emotional states (that is, anxiety, depression, and stress) among a sample of incarcerated women-a small but growing correctional population. Data were obtained from a survey of women incarcerated in two prisons in Spain (N = 174); survey questions elicited information on these women's emotional, physical, and sexual victimization during childhood in addition to their self-reported levels of social support and mental health. A series of analyses indicated that female inmates who reported ACEs similarly reported lower levels of social support and higher levels of depression, anxiety, and stress as compared with nonvictimized women inmates. The findings reported here underscore the importance of attaining a fuller understanding of female inmates' histories of ACEs so that we can more accurately identify and, ideally, provide necessary services to those women at highest risk of mental health-related problems during incarceration.

Is there a female cycle of violence after exposure to childhood maltreatment? A meta-analysis

Several studies have demonstrated a vicious cycle of violence, in which experiences of childhood maltreatment (CM) transition into later perpetration of aggressive acts. But evidence for the presence of this cycle in adult women is mixed. The aim of this meta-analysis is to investigate the strength of associations and the mechanisms underlying a cycle of violence in women. Databases were searched for terms related to female aggression, violence, delinquency, antisocial behavior, or offending in addition to exposure to traumatic experiences, abuse, or maltreatment during childhood. Only peer-reviewed studies were included that investigated associations between any type of CM and different acts of aggression. Multi-level meta-analyses were applied, as well as meta-regressions, all based on Cohen's d. K = 34 studies were identified. The overall association between exposure to CM was in the positive but small range (Cohen's d = 0.30). There was no significant difference between specific types of abuse and/or neglect. However, associations were smaller for the perpetration of sexual aggression and violent crime compared with other acts of aggression. These findings underline the long-lasting and devastating impact of CM, including types of maltreatment that were long assumed to be less severe. Due to the limited number of available studies, interactions between types of CM and aggression could not be modeled, thus compromising their probable interacting contribution to the cycle of violence. Early interventions targeting families and women at risk are critical in order to prevent ongoing cycles of violence.

Testing the cycle of maltreatment hypothesis: Meta-analytic evidence of the intergenerational transmission of child maltreatment

It has long been claimed that "maltreatment begets maltreatment," that is, a parent's history of maltreatment increases the risk that his or her child will also suffer maltreatment. However, significant methodological concerns have been raised regarding evidence supporting this assertion, with some arguing that the association weakens in samples with higher methodological rigor. In the current study, the intergenerational transmission of maltreatment hypothesis is examined in 142 studies (149 samples; 227,918 dyads) that underwent a methodological quality review, as well as data extraction on a number of potential moderator variables. Results reveal a modest association of intergenerational maltreatment (k = 80; d = 0.45, 95% confidence interval; CI [0.37, 0.54]). Support for the intergenerational transmission of specific maltreatment types was also observed (neglect: k = 13, d = 0.24, 95% CI [0.11, 0.37]; physical abuse: k = 61, d = 0.41, 95% CI [0.33, 0.49]; emotional abuse: k = 18, d = 0.57, 95% CI [0.43, 0.71]; sexual abuse: k = 18, d = 0.39, 95% CI [0.24, 0.55]). Methodological quality only emerged as a significant moderator of the intergenerational transmission of physical abuse, with a weakening of effect sizes as methodological rigor increased. Evidence from this meta-analysis confirms the cycle of maltreatment hypothesis, although effect sizes were modest. Future research should focus on deepening understanding of mechanisms of transmission, as well as identifying protective factors that can effectively break the cycle of maltreatment.

Young People Under Youth Justice Supervision With Varying Child Protection Histories: An Analysis of Group Differences

There is now convincing evidence that childhood maltreatment is associated with youth offending; however, relatively little is known about the characteristics and needs of those who are involved in both the child protection and youth justice systems, and the extent to which these might differ according to level of child protection involvement. This study reports the characteristics and needs of 2,045 young people who were under supervision in secure custody or detention in South Australia between 1995 and 2012 according to the level of exposure to the child protection system in an Australian jurisdiction. Five groups of young offenders were compared: (a) no known child protection notifications or substantiated experience of abuse and/or neglect, (b) notifications only, (c) substantiated notifications, (d) notifications or substantiations and subsequent placement in out-of-home care (OHC), and (e) placement in OHC only. The results indicate that young people who have a history of child protection system involvement have significantly greater and more complex needs than those who have no child protection experience. It is concluded that different service responses may be required to meet the diverse needs of these groups of young people under youth justice supervision.

Risk factors for interpersonal violence: an umbrella review of meta-analyses

BACKGROUND

Interpersonal violence is a leading cause of morbidity and mortality. The strength and population effect of modifiable risk factors for interpersonal violence, and the quality of the research evidence is not known.AimsWe aimed to examine the strength and population effect of modifiable risk factors for interpersonal violence, and the quality and reproducibility of the research evidence.

METHOD

We conducted an umbrella review of systematic reviews and meta-analyses of risk factors for interpersonal violence. A systematic search was conducted to identify systematic reviews and meta-analyses in general population samples. Effect sizes were extracted, converted into odds ratios and synthesised, and population attributable risk fractions (PAF) were calculated. Quality analyses were performed, including of small study effects, adjustment for confounders and heterogeneity. Secondary analyses for aggression, intimate partner violence and homicide were conducted, and systematic reviews (without meta-analyses) were summarised.

RESULTS

We identified 22 meta-analyses reporting on risk factors for interpersonal violence. Neuropsychiatric disorders were among the strongest in relative and absolute terms. The neuropsychiatric risk factor that had the largest effect at a population level were substance use disorders, with a PAF of 14.8% (95% CI 9.0-21.6%), and the most important historical factor was witnessing or being a victim of violence in childhood (PAF = 12.2%, 95% CI 6.5-17.4%). There was evidence of small study effects and large heterogeneity.

CONCLUSIONS

National strategies for the prevention of interpersonal violence may need to review policies concerning the identification and treatment of modifiable risk factors.Declarations of interestJ.R.G. is an NIHR Senior Investigator. The views expressed within this article are those of the authors and not necessarily those of the NHS, the NIHR or the Department of Health and Social Care.

Exposure to Family Violence and Internalizing and Externalizing Problems Among Spanish Adolescents

Exposure to intimate partner violence (IPV) and child maltreatment may have devastating consequences on children's development. The aim of this research was to examine the predictive associations between exposure to violence at home (witnessing violence against the mother and/or direct victimization by the parents) and adolescent internalizing and externalizing problems. A total of 613 Spanish adolescents (13-18 years) took part in this study. Results indicate that psychological victimization by the parents predicted an increase in anxious/depressive symptoms, aggressive and rule-breaking behavior, and substance abuse at Time 2. In addition, rule-breaking behavior predicted an increase in adolescents' substance abuse at Time 2. Concerning gender, psychological victimization predicted an increase in anxiety/depression, aggressive behavior, rule-breaking behavior, and substance abuse in boys; whereas in girls, psychological victimization only predicted an increase in anxiety/depression.

The Impact of Types and Extent of Trauma on Depressive Affect Among Male Juvenile Sexual Offenders

High levels of depression have been found among incarcerated youth, which suggests that mental health problems are associated with delinquent behavior and are part of a constellation of risk factors that contribute to youth entering the juvenile justice system. In this project, we investigated trauma and mental health issues among male youth in residential treatment, and addressed the following questions: (a) Does childhood trauma predict current depression for male juvenile sexual offenders? (b) If so, do different types of traumas predict depressive affect better than others? and, (c) Does extent of trauma exposure predict depression? Data on incarcerated male juvenile sexual offenders were analyzed ( n = 379). Multiple regressions of various types of traumas and cumulative trauma and depression were conducted. Emotional abuse was the strongest predictor of depressive affect for this sample, and multiple exposures to trauma were the second strongest predictor.

Den transgenerationalen Kreislauf der Gewalt durchbrechen

Zusammenfassung. Die langfristigen Folgen des transgenerationalen Kreislaufs der Gewalt belegen die Notwendigkeit für evidenzbasierte Interventionen, um aggressiv-dissoziales Verhalten von Jugendlichen mit Misshandlungs- und Gewalterfahrungen abzubauen. Es erfolgt ein Überblick über solche Therapieansätze und ihre Wirksamkeit. Es werden etablierte Programme dargestellt, deren Wirksamkeit in randomisierten Kontrollgruppenstudien überprüft wurde. Es existieren wenige manualisierte Therapierogramme, die den Abbau aggressiven Verhaltens bei Jugendlichen mit Misshandlungs- und Gewalterfahrungen evaluieren. Solche Therapierogramme bauen aggressives Verhalten bei Jugendlichen mit traumatischen Erfahrungen effektiv ab. Ihre Effektivität wurde in sehr unterschiedlichen Kontexten beurteilt, was einen Vergleich erschwert. Komponenten, die wiederholt erfolgreich angewandt wurden, waren die Aufklärung und Sensibilisierung gegenüber dem Thema „Gewalt“ und die Aufarbeitung einer Narration, die darauf abzielt, die traumatische Erfahrung in das autobiographische Gedächtnis einzuordnen und eine Habituierung zu fördern. Daraus wird geschlossen, dass eine Bearbeitung von Traumata häufig im Vorfeld notwendig ist, um aggressiv-dissoziales Verhalten zu verringern oder abzubauen. Für einen langfristigen Erfolg im Rahmen des Abbaus von aggressiv-dissozialem Verhalten sind jedoch Therapieverfahren notwendig, die sich spezifisch auf aggressiv-dissoziales Verhalten als primäres und nicht sekundäres Ziel (neben der Traumabewältigung) beziehen.

Risk Factors for Antisocial Behavior in Low- and Middle-Income Countries: A Systematic Review of Longitudinal Studies

Violent crime is a major cause of social instability, injury, and death in low- and middle-income countries. Longitudinal studies in high-income countries have provided important evidence on developmental precursors of violence and other antisocial behaviors. However, there may be unique influences or different risk factor effects in other social settings. Extensive searches in seven languages and screening of over 60,000 references identified 39 longitudinal studies of antisocial behavior in low- and middle-income countries. Many risk factors have roughly the same average effects as when studied in high-income countries. Stability of aggression over a 3-year period is almost identical across low- and middle-income countries and high-income countries. Dimensions of comorbid psychopathology such as low self-control, hyperactivity, and sensation seeking are associated with antisocial behavior in low- and middle-income countries, but some early physical health factors have consistently weak or null effects.

The role of trauma in the hormonal interplay of cortisol, testosterone, and oxytocin in adolescent aggression

Although numerous studies have examined the neuroendocrinology of aggression, the findings are mixed and focused on cortisol and testosterone. We argue that past findings remain inconclusive partly because the key roles of oxytocin and trauma have not been systematically integrated yet. Oxytocin is associated with social behavior and interacts with cortisol and testosterone, whereas trauma is a crucial risk factor of aggression that strongly affects hormonal activity. In this review, we investigate the role of trauma in the hormonal interplay of cortisol, testosterone, and oxytocin in aggression during adolescence. We first discuss how these hormones interact with each other and how trauma influences these interactions and then we propose a model that highlights the role of trauma in the hormonal interplay in aggression. We suggest that the timing of trauma has a distinct effect on hormonal activity and it should be integrated into any comprehensive model. Current trauma is linked to different levels of oxytocin, cortisol, testosterone, and testosterone/cortisol ratio than childhood trauma, but this distinction is also influenced by gender and type of aggression. We conclude that in order to better understand the neuroendocrinology of aggression, it is crucial to incorporate the investigation of oxytocin and trauma in future research.

The Maltreatment-Offending Association: A Systematic Review of the Methodological Features of Prospective and Longitudinal Studies

Although the association between childhood maltreatment and the subsequent development of offending behavior is well documented, the association does not necessarily reflect a causal relationship. This paper provides a systematic review of prospective and longitudinal studies using official records of maltreatment to gain insights into the extent to which methodological variations are likely to influence the conclusions drawn about the likely relationship between maltreatment and offending. Sixty-two original studies met the inclusion criteria. These studies were assessed according to a set of seven methodological criteria: (1) inclusion of comparison groups, (2) the use of statistical controls, (3) valid outcome measures, (4) operationalization of maltreatment, (5) proper temporal order of associations, (6) data relating to unsubstantiated maltreatment, and (7) consideration of mediating and moderating factors. The strength of evidence in support of the maltreatment-offending association was influenced by a number of methodological factors. Despite the increasing sophistication of studies, there is a need to be mindful of how these factors are taken into account in future research in order to gain a deeper understanding of the adverse consequences of maltreatment and how this might influence outcomes and inform interventions.

Motivations for Selling Ecstasy among Young Adults in the Electronic Dance Music Club Culture in Brazil

This article describes data on the motivations for selling ecstasy among young adults in the electronic dance music (EDM) club culture in Brazil. Individual interviews were conducted with 20 individuals recruited for their involvement in the EDM club scene. Eligible participants were aged 18-39 and reported ecstasy and/or LSD use one or more times in the past 90 days. Exclusion criteria included current treatment for drug/alcohol problems and cognitive impairment or clinically evident psychiatric disorder. Mean age was 22.92 (SD 2.77), 60% were male, 45% reported 12 or more years of education, 50% did not have a primary partner, 50% were living alone, and all had friends who also used ecstasy. Three main themes emerged: (1) "easy" transition from ecstasy user to seller; (2) desire to achieve popularity and fame; and (3) need to sell ecstasy to maintain the high cost of EDM club scene participation. This is one of the first studies of ecstasy sellers in Brazil. The results demonstrate the ease with which the participants transition from ecstasy user to seller. Given the potential health and social dangers associated with ecstasy use, public health campaigns to prevent ecstasy use and policy initiatives to limit the ecstasy supply are warranted.

The child protection and juvenile justice nexus in Australia: A longitudinal examination of the relationship between maltreatment and offending

There is convincing evidence that many young people who are in the justice system have had contact with child protection services and that victims of childhood maltreatment are at increased risk of subsequent youth justice involvement. In Australia, however, there have been few longitudinal studies that have examined these associations and relatively less is known in this area. This study examines the overlap between the child protection and youth justice involvement in South Australia, and determines how substantiated maltreatment and variations in these experiences (e.g., the type, timing and recurrence of maltreatment) relate to criminal convictions as a youth. The results show that although the majority of child-protection involved youth do not become convicted offenders, the odds of subsequent convictions are significantly greater both for those with notifications and substantiated maltreatment and for those who had been placed in out-of-home care. Multivariate analyses revealed that the strongest predictors for receiving a conviction among maltreated youth were: male gender, Aboriginal and Torres Strait Islander ethnicity, experiences of physical abuse and emotional abuse, a greater number of substantiations (recurrence), experiencing maltreatment that commenced in childhood and continued into adolescence, and placement in out-of-home care. The mechanisms through which maltreatment might be linked with behavior are then considered, along with directions for future research in this area.

Posttraumatic Stress and Youth Violence Perpetration: a Population-Based Cross-Sectional Study

Background

Exposure to trauma was found to increase later violent behaviours in youth but the underlying psychopathological mechanisms are unclear. This study aimed to test whether posttraumatic stress disorder (PTSD) is related to violent behaviours and whether PTSD symptoms mediate the relationship between the number of trauma experiences and violent behaviours in adolescents.

Method

The present study is based on a nationally representative sample of 9th grade students with 3434 boys (mean age = 15.5 years) and 3194 girls (mean age = 15.5 years) in Switzerland. Lifetime exposure to traumatic events and current PTSD were assessed by the use of the University of California at Los Angeles Posttraumatic Stress Disorder Reaction Index (UCLA-RI). Logistic regression was used to assess associations between PTSD and violent behaviours, and structural equation modelling (SEM) was used to examine the meditation effects of PTSD.

Results

PTSD (boys: OR = 7.9; girls: OR = 5.5) was strongly related to violent behaviours. PTSD symptoms partially mediated the association between trauma exposure and violent behaviours in boys but not in girls. PTSD symptoms of dysphoric arousal were positively related to violent behaviours in both genders. Anxious arousal symptoms were negatively related to violent behaviours in boys but not in girls.

Conclusions

In addition to trauma, posttraumatic stress is related to violent outcomes. However, specific symptom clusters of PTSD seem differently related to violent behaviours and they do not fully explain a trauma-violence link. Specific interventions to improve emotion regulation skills may be useful particularly in boys with elevated PTSD dysphoric arousal in order to break up the cycle of violence.

Young Offenders, Maltreatment, and Trauma: A Pilot Study

Although a large number of studies offer consistent and persuasive evidence that exposure to childhood maltreatment and subsequent juvenile offending behaviours are related, relatively few studies have investigated the mechanisms by which maltreatment might increase risk in young offender populations. The aim of this pilot study was to collate data on the key areas of need from 28 young male offenders in secure care in an Australian jurisdiction, with a specific focus on the inter-relationship between scores on self-report measures of maltreatment, trauma, and mental health. The findings provide preliminary evidence that these key constructs are linked to other proximal risk factors for juvenile offending, such as poor anger regulation and antisocial thinking patterns. They offer a rationale for considering the sequelae of maltreatment in the development of service delivery frameworks for young offenders.

Emotional Desensitization to Violence Contributes to Adolescents' Violent Behavior

Many adolescents are exposed to violence in their schools, communities and homes. Exposure to violence at high levels or across multiple contexts has been linked with emotional desensitization, indicated by low levels of internalizing symptoms. However, the long-term consequences of such desensitization are unknown. This study examined emotional desensitization to violence, together with externalizing problems, as mediators of the relationship between exposure to violence in pre-adolescence and violent behavior in late adolescence. A community sample of youth (N = 704; 48% female; 76% African American, 22% Caucasian) reported on their exposure to violence in multiple settings at ages 11, 13 and 18. Internalizing and externalizing problems were assessed at ages 11 and 13; violent behavior was measured at age 18. Structural Equation Modeling showed that exposure to high levels of violence at age 11 was associated with lower levels of internalizing problems (quadratic effect) at age 13, as was exposure to violence across multiple contexts (linear effect). In turn, fewer internalizing problems and more externalizing problems at age 13 predicted more violent behavior at age 18. The results suggest that emotional desensitization to violence in early adolescence contributes to serious violence in late adolescence.

Traumatic Stress Among Seriously Delinquent Youth: Considering the Consequences of Neighborhood Circumstance

Myriad factors have been found to have an impact on delinquent behavior and traumatic stress. This study proposes a model that tests the relationship between common predictors of delinquency (neighborhood condition, antisocial peer socialization, and exposure to violence) with traumatic stress. Serial mediation was used to test the relationships between these predictors and traumatic stress. Results indicate the mediation effect between neighborhood conditions and traumatic stress significantly reduces the total effect. Implications for traumatic stress in the context of delinquent behavior are discussed.

Can the fear recognition deficits associated with callous-unemotional traits be identified in early childhood?

INTRODUCTION

Callous-unemotional (CU) traits in the presence of conduct problems are associated with increased risk of severe antisocial behavior. Developmentally sensitive methods of assessing CU traits have recently been generated, but their construct validity in relation to neurocognitive underpinnings of CU has not been demonstrated. The current study sought to investigate whether the fear-specific emotion recognition deficits associated with CU traits in older individuals are developmentally expressed in young children as low concern for others and punishment insensitivity.

METHOD

A subsample of 337 preschoolers (mean age 4.8 years, SD = 0.8) who completed neurocognitive tasks was taken from a larger project of preschool psychopathology. Children completed an emotional recognition task in which they were asked to identify the emotional face from the neutral faces in an array. CU traits were assessed using the Low Concern (LC) and Punishment Insensitivity (PI) subscales of the Multidimensional Assessment Profile of Disruptive Behavior (MAP-DB), which were specifically designed to differentiate the normative misbehavior of early childhood from atypical patterns.

RESULTS

High LC, but not PI, scores were associated with a fear-specific deficit in emotion recognition. Girls were more accurate than boys in identifying emotional expressions but no significant interaction between LC or PI and sex was observed.

CONCLUSIONS

Fear recognition deficits associated with CU traits in older individuals were observed in preschoolers with developmentally defined patterns of low concern for others. Confirming that the link between CU-related impairments in empathy and distinct neurocognitive deficits is present in very young children suggests that developmentally specified measurement can detect the substrates of these severe behavioral patterns beginning much earlier than prior work. Exploring the development of CU traits and disruptive behavior disorders at very early ages may provide insights critical to early intervention and prevention of severe antisocial behavior.

The different faces of impulsivity as links between childhood maltreatment and young adult crime

Crime is a major public health and safety threat. Many studies have suggested that early exposure to child maltreatment increases an individual's risk for persistent serious crime in adulthood. Despite these findings about the connection between child maltreatment and criminal behavior, there is a paucity of empirically-based knowledge about the processes or pathways that link child maltreatment to later involvement in crime. Using a community sample of 337 young adults (ages 18-25) in a U.S. metropolitan area, the present study examined the role of various facets of impulsivity in linking child maltreatment to crime. A series of factor analyses identified three types of crime including property crime, violent crime, and fraud. Structural equation modelings were conducted to examine the associations among childhood maltreatment, four facets of impulsivity, and criminal behavior, controlling for sociodemographic information, family income and psychological symptoms. The present study found that child emotional abuse was indirectly related to property crime and fraud through urgency while a lack of premeditation mediates the relationship between child neglect and property crime. Child physical abuse was directly related to all three types of crime. Personality traits of urgency and lack of premeditation may play a significant role in the maltreatment-crime link. Preventive interventions targeting impulsivity traits such as urgency and a lack of premeditation might have promising impacts in curbing criminal behavior among maltreatment victims.