Sibling and peer victimization in childhood and adolescence

Sibling bullying victimization and subjective well-being among children across 13 countries: The mediating roles of perceived social support and the moderating role of uncertainty avoidance culture

BACKGROUND

While sibling bullying victimization has been recognized as a significant factor detrimentally impacting children's subjective well-being, the underlying mechanisms have yet to be fully elucidated.

OBJECTIVE

This study seeks to investigate the potential mediating role of perceived social support, encompassing support from family, friend, teacher, and neighbor, as well as the moderating influence of uncertainty avoidance culture.

PARTICIPANTS AND SETTING

A sample of 19,328 children was obtained from Wave Three of Children's Worlds: International Survey of Children's Well-being in 13 countries.

METHODS

The structural equation model (SEM) was used to investigate the mediating role of perceived social support in the relationship between sibling bullying victimization and children's subjective well-being. The multiple group analysis was carried out to assess the moderating role of uncertainty avoidance culture.

RESULTS

This study reveals a negative association between sibling bullying victimization and children's subjective well-being (β = -0.138, p < 0.001). Perceived support from family, friend, teacher, and neighbor emerges as a mediating mechanism in this relationship. Uncertainty avoidance culture moderates this relationship, and this association is stronger for children raised in a strong uncertainty avoidance culture (β = -0.085, p < 0.001).

CONCLUSIONS

The results of this study contribute to our comprehension of the nexus between sibling bullying victimization and children's subjective well-being. Moreover, this study extends the current body of knowledge by delving into the cultural disparities spanning various countries.

Sibling bullying reported by emerging adults: Profiling the prevalence, roles, and forms in a cross-country investigation

Prevalence estimates of sibling bullying indicate it occurs more frequently and with more negative consequences than peer bullying, yet many countries do not track or investigate the phenomenon. University students from Argentina, Estonia, and the United States were surveyed to investigate their retrospective experiences involving sibling bullying, how often it occurred, the roles held, and the forms communicated. In the aggregated data, roughly 50 % of the sampled emerging adults (N = 3477) reported experience with sibling bullying, with the dual role of bully-victim being the most frequently reported role held by males and females, with the second role being bully for males and victim for females. Verbal forms of bullying were most frequently reported by males and females, with physical, relational, and technological forms occurring less frequently, indicating the importance of studying the messages conveyed during bullying incidents. Variations between biological sex, bullying role and form were detected that indicate siblings experience bullying in ways that are unique from peer bullying. Country comparisons revealed bullying frequencies varied among males and females, suggesting sibling bullying experiences are likely to be culturally influenced. More research is warranted to examine the negative impact bullying has on sibling psycho-social development and the potential transfer to non-familial relationships and contexts. Discussion of these findings and the implications for academics and practitioners alike is provided.

Sibling Violence and Bullying Behaviors in Peers: The Mediational Role of Self-Esteem

In the context of the existing research on families, sibling violence is a less explored area. However, it has seemingly received more attention recently, and it can assume a relevant role in understanding the maladaptive behavior of youngsters and bullying. Additionally, adolescents involved in bullying and self-esteem are associated with disruptive violence inside the family context. This study's sample consisted of 286 students, aged between 12 and 17 years, from both sexes. This study intends to explore the association between sibling violence and bullying behavior in peers and the mediator effect of self-esteem. The measures for data collection were a demographic questionnaire, the Social Exclusion and School Violence Questionnaire, The Revised Conflict Tactics Scales (Portuguese version for siblings), and the Rosenberg Self-Esteem Scale. The results show a negative effect between negotiation in the sibling relationship (victimization) and social exclusion and verbal aggression related to bullying behavior. Self-esteem represents a total and negative mediator in this connection. Our results also show a variety of indirect outcomes amongst the negotiation dimension, psychological aggression and injury between siblings, and the social exclusion and verbal aggression dimensions (on the aggression and victimization scales). The results will be discussed according to the attachment theory but considering the importance of affective bonds with siblings as a predisposing factor to an adaptive development course.

[Emotional Maltreatment of Children and Adolescents - Definitions, Prevalences, Risk Factors and Psychological Consequences]

The aim of this article is to provide an introductory overview of the phenomenon of emotional maltreatment of children and adolescents by presenting national and international literature and, in particular, to illustrate the consequences for the mental health of those affected. First, relevant definitions are made and forms of appearance of emotional child maltreatment are presented. A comparison of national and global prevalences shows that emotional child maltreatment is one of the most prevalent forms of child maltreatment. There are different risk factors that can exist at the level of the parents as well as at the level of the children or the environment. The risk that children and adolescents who have experienced emotional violence will have experienced other forms of childmaltreatment is high.There aremultiple consequences for victims of emotional child maltreatment which can result in different, longterm participatory impairments. Especially the psychological and somatic consequences of emotional childmaltreatment can be compared to the consequences of child sexual abuse and physical child maltreatment. Nevertheless, the significance of emotional maltreatment for affected children and adolescents is still underestimated in practice. Often, the effects of emotionalmaltreatment on those affected are not visible. Froma child and adolescent psychiatric/ psychotherapeutic perspective, the psychological consequences must therefore be clearly stated. Finally, there is a need for a broader understanding of emotional child maltreatment that also includes peer and sibling violence.

Sibling Experiences of Adverse Childhood Experiences: A Scoping Review

Adverse childhood experiences (ACEs) are traumatic events during childhood known to affect health and well-being across the life span. The detrimental impact ACEs have on children and young people is well-established. It is also known that 85 to 90% of children have at least one sibling. Using this as the foundation for our inquiry, the purpose of this scoping review was to understand what we currently know about the experiences of siblings living with ACEs. Sibling relationships are unique, and for some the most enduring of experiences. These relationships can be thought of as bonds held together by love and warmth; however, they can also provide scope for undesirable outcomes, such as escalation of conflicts and animosities. This scoping review was conducted following Arksey and O'Malley's (2005) methodological framework, complemented by the PAGER framework (Bradbury-Jones et al. 2021), offering a structured approach to the review's analysis and reporting through presenting the Patterns, Advances, Gaps, and Evidence for practice and Research. In June 2020, we searched 12 databases, with 11,469 results. Articles were screened for eligibility by the review team leaving a total of 148 articles meeting the inclusion criteria. Included articles highlighted overwhelming evidence of older siblings shielding younger siblings, and the likelihood that when one sibling experiences adversity, other siblings will be experiencing it themselves or vicariously. The implications of this in practice are that support services and statutory bodies need to ensure considerations are given to all siblings when one has presented with experiencing childhood adversity, especially to older siblings who may take far more burden as regards care-giving and protection of younger siblings. Given that more than half of the included articles did not offer any theoretical understanding to sibling experiences of ACEs, this area is of importance for future research. Greater attention is also needed for research exploring different types of sibling relationships (full, step, half), and whether these influence the impact that ACEs have on children and young people.

Factors affecting sibling bullying and its association with self-esteem and depression in middle school students

Sibling bullying is an unwanted aggressive behavior of a sibling that is associated with peer bullying and emotional problems. However, the prevalence of sibling bullying, the factors that affect this condition, and its impact on depression and self-esteem are understudied, especially in Thailand. This study aims to examine the prevalence of sibling bullying, factors that affect sibling bullying, and its association with self-esteem and depression during the pandemic. From January to February 2022, a cross-sectional study was conducted in grades 7-9 (age 12-15 years) who had at least one sibling. Demographic characteristics, sibling bullying, self-esteem, and depression were collected using the revised Olweus bully/victim questionnaire, the Rosenberg self-esteem scale, and Patient Health Questionnaire-9, respectively. Binary logistic regression was analyzed to determine associations between sibling bullying and outcomes. Of 352 participants (30.4% female), 92 (26.1%) were victims and 49 (13.9%) were bullies of sibling bullying in the previous 6 months. Factors associated with an increased risk of being victims included female (OR = 2.46; 95%CI 1.34-4.53), peer victimization (OR = 12.99; 95%CI 5.27-32.04), domestic violence (OR = 4.48; 95%CI 1.68-11.95), and perpetrating sibling bullying (OR = 9.81; 95%CI 4.62-20.81). Factors associated with an increased risk of depression were female (OR = 2.59; 95%CI 1.57-4.26), sibling bullying victimization (OR = 2.08; 95%CI 1.22-3.56), physical abuse (OR = 9.50, 95%CI 1.13-79.71) and domestic violence (OR = 3.44; 95%CI 1.40-8.45).  Conclusion: Sibling bullying was not uncommon in Thai young adolescents and was associated with female, peer bullying, domestic violence, and depression. Such associations should be identified early so preventive measures and management could be properly implemented. What is Known: • Sibling bullying increases the risk for engaging in peer bullying, aggressive behaviors, violence, and emotional difficulties during life course trajectories. • Victims of sibling bullying are at increased risk of depression, anxiety, mental distress, self-harm, and decreased well-being. What is New: • The rate of sibling bullying in Thai middle school students, even during the pandemic, was comparable to previous studies of different cultural backgrounds without the pandemic. • Victims of sibling bullying were associated with female sex, peer victimization, domestic violence, perpetrating sibling bullying, and depression. Perpetrating sibling bullying was also associated with bullies in cyberbullying.

The Associations between Sibling Victimization, Sibling Bullying, Parental Acceptance-Rejection, and School Bullying

Bullying has been identified as the most common form of aggression experienced by school-age youth. However, it is still unclear about the family's influence on school bullying. Therefore, the current study aimed to explore the associations between sibling bullying and school bullying, sibling victimization and school victimization, and parental acceptance-rejection and school bullying victimization. The study was cross-sectional and conducted on a sample of students aged between 11 and 20 years recruited from middle schools in Algeria. The study used a survey adopted from the scale of Sibling Bullying, Student Survey of Bullying Behavior-Revised 2, and the Survey of parental acceptance-rejection in collecting the data. The model's results assessing the association between sibling bullying and school bullying demonstrated that the effect of sibling physical and sibling verbal victims on school victimization was statistically significant. Despite the non-significant effect of sibling emotional victims on school victimization, the effect of sibling physical and sibling verbal bullying on school bullying was statistically significant. However, the effect of sibling emotional bullying on school bullying was not statistically significant. The direct effect of parental acceptance on school victimization was not statistically significant, whereas the effect of parental rejection on school victimization was statistically significant. The direct effect of parental acceptance on school bullying was not statistically significant, while the effect of parental rejection on school bullying was statistically significant. Based on the results, this study provides insights into the understanding of how the family and siblings contribute to school bullying. In particular, sibling victimization, sibling bullying, and parental acceptance-rejection are predictive factors of school bullying among adolescents. Future research should take into account factors based on family to explore the risks of school bullying.

Co-occurrence of sibling and peer bullying victimization and depression and anxiety among Chinese adolescents: The role of sexual orientation

BACKGROUND

Bullying victimization is a robust predictor of mental distress among lesbian/gay, bisexual, and questioning (LGBQ) adolescents. However, few research accounted bullying victimization within the context of both sibling and peer relationships.

OBJECTIVE

To examine the effect of sibling and peer bullying victimization on depression and anxiety between heterosexual adolescents and LGBQ adolescents.

METHOD

This was a cross-sectional study with a random sample of 3062 Chinese senior high school students (56.0% female) aged 14 to 18. Related information was collected through a self-reported questionnaire. The associations were examined via a set of logistic regression analysis.

RESULTS

Of the participants, 12.5% were victims of sibling bullying only, 10.1% reported peer victimization only, and 4.7% were involved in both sibling and peer victimization. Compared to heterosexuals, LGBQ adolescents had increased risks of sibling victimization only, peer victimization only, and both sibling and peer victimization. The prevalence of major depression and generalized anxiety disorder were 24.9% and 18.7% respectively. Bullying victimization and sexual orientation were independently associated with depression and anxiety. Furthermore, the stratified analysis indicated that sibling victimization only was significantly associated with depression and anxiety for heterosexual adolescents, while the associations were not significant for LGBQ adolescents.

CONCLUSIONS

Sexual orientation and bullying victimization are predictive factors of depression and anxiety. In particular, bullying victimization shows the different effects on depression and anxiety between heterosexual and LGBQ adolescents. Anti-bullying intervention could take distinct strategies based on different sexual orientation to reduce risks of adolescents' mental health problems.

Prevalence and Associated Family Factors of Sibling Bullying Among Chinese Children and Adolescents

Sibling bullying is the most common form of aggression within family worldwide, while the prevalence and correlations of sibling bullying is little known in China. The current research focused on the association between family factors and sibling bullying among Chinese adolescents, and explore sex differences in sibling bullying in the context of Chinese culture. A cross-sectional study was conducted to explore the characteristics of sibling bullying by sampling 6302 children and adolescents who had at least 1 sibling living in the household. Of the participants, 1827 (29.0%) were involved in sibling bullying over the past half year, and pure victims, pure bullies, and bully-victims were 486 (7.7%), 510 (8.1%), and 831 (13.2%), respectively. Family factors of sibling bullying were partly different between boys and girls. Parental absence of both father and mother was a risk factor of being a pure bully and a bully-victim for boys, and of being a pure victim for girls. Parental son preference increased the odds of being a pure victim and a bully-victim for boys, and of being all roles of sibling bullying involvement for girls. Besides, parent–parent violence, parent–child violence, and living with a single parent were risk factors of sibling bullying. The results underline the importance of home environment on sibling relationship, and intervention of sibling bullying should include improving family climate.

Changes in peer and sibling victimization in early adolescence: longitudinal associations with multiple indices of mental health in a prospective birth cohort study

Victimization by peers and siblings is associated with poorer mental health outcomes in adolescence. What is less clear is whether mental health outcomes improve if victimization experiences cease (e.g., being victimized in primary school but not secondary school). This study aims to explore how changes in victimization experiences are associated with changes in mental health outcomes in early adolescence. Data are from 13,912 participants in the Millennium Cohort Study (MCS), a nationally representative cohort of individuals born in the UK. Self-reported victimization by peers and siblings, as well as mental health outcomes (depressive symptoms, life satisfaction, self-esteem, and body image), were collected at age 11 and age 14. Victimization at either time point was associated with poorer mental health across the range of outcomes, with effects largest for those who were consistently victimized. Those who reported increasing victimization had greater deterioration in their mental health compared with their peers who were never victimized. Conversely, children whose victimization decreased showed similar mental health development over this period as those who were never victimized. There was a cumulative effect of victimization by peers and siblings, with effect sizes generally larger for experiences with peers. Victimization in adolescence is associated with enduring reductions in mental health. Nonetheless, the promising outcomes associated with reductions in victimization suggest the potential for bullying interventions in schools to limit the deterioration in mental health in victimized groups.

Sibling, Peer, and Cyber Bullying Among Children and Adolescents: Co-occurrence and Implications for Their Adjustment

Bullying across the sibling, peer, and cyber context has consistently been associated with a range of long-term health and well-being consequences for children and adolescents. Although research examining different bullying forms simultaneously in the same study are emerging, it remains unclear to what extend sibling, peer, and cyber bullying co-occur and in what ways they are associated. Moreover, previous work has demonstrated that children and adolescents who experience multiple forms of victimization are at a particular risk of adverse outcomes. However, whether different constellations of co-occurring bullying forms have differential impacts has not yet been investigated sufficiently. The aim of the present study was to examine the frequencies of isolated and co-occurring sibling, peer, and cyber bullying as well as to explore their independent and cumulative relationships with child adjustment. This study was based on a sample of 329 children and adolescents aged between 9 and 15. Bullying experiences across the sibling, peer, and cyber context in the previous 6 months were assessed via self-report. Youth further reported on emotional problems, conduct problems, sleep problems, and academic achievement via an online questionnaire. Sibling, peer, and cyber bullying were uniquely associated with child outcomes. A cumulative relationship between bullying victimization across contexts and emotional problems, conduct problems, and sleep problems could be identified, while bullying perpetration across contexts was only linked to more conduct problems in a cumulative manner. The findings have important practical implications arguing for the adoption of a holistic approach toward bullying in prevention and intervention.

Impact of Sibling Victimization on Child Internalizing Symptoms

The current study examined associations between sibling victimization and anxiety and depression symptoms while also considering peer victimization within time and six months later among elementary school-age youth. Both sibling and peer victimization were associated with depression symptoms within as well as across time when considered independently. However, when examined together, peer victimization was only uniquely associated with depression symptoms within time and sibling victimization was only uniquely associated with depression symptoms across time. Sibling and peer victimization were associated with anxiety symptoms within, but not across, time when examined independently, and no associations were evident when sibling and peer victimization were examined simultaneously. No interactive effects of sibling and peer victimization were evident for depression or anxiety symptoms, indicating unique rather than cumulative contributions. Findings suggest that the impact of sibling victimization on depression symptoms is more robust than effects of peer victimization over time.

Characteristics of Disclosing Childhood Victimization and Risk of Revictimization in Young Adulthood

Experiencing victimization in childhood increases risk of adulthood revictimization, and it is important to understand what may contribute to such risk. One factor that may help to explain the increased risk of future victimization is disclosure. However, the literature is mixed as to whether disclosure of prior victimization is helpful for protecting against adverse outcomes, and much of the research on disclosure focuses solely on sexual victimization. The current study examines the relationship between various forms of childhood and adulthood victimization and whether disclosure moderates this relationship. In addition, this study investigates whether characteristics of disclosure are associated with revictimization risk. The sample included 275 undergraduates (M age = 19.52 years; 75.6% female, 77.5% non-Hispanic White or Caucasian). Participants reported on previous history of various forms of childhood and adulthood victimization. They also reported whether or not they had disclosed childhood victimization, and, if so, characteristics related to disclosure. Results revealed that number of childhood victimization experiences significantly predicted number of adulthood victimization experiences, and nearly every type of childhood victimization significantly increased risk of experiencing each type of adulthood victimization. Disclosure did not moderate the relationship between childhood and adulthood victimization. Participants who disclosed were more likely to disclose crime and peer/sibling victimization and disclose to parents or friends. Positive reactions to disclosure were more common than negative reactions; however, 75% of disclosers received at least one negative reaction. Finally, revictimized individuals received more overall negative reactions than nonrevictimized individuals. They also received more reactions characterized by the person they disclosed to trying to take control of their decisions or treating them differently. Results highlight the importance of examining relationships between various forms of victimization, considering how characteristics of disclosure relate to risk of revictimization, and the importance of educating potential support networks about appropriate responses to disclosure.

Intergenerational maltreatment in parent-child dyads from Burundi, Africa: Associations among parental depression and connectedness, posttraumatic stress symptoms, and aggression in children

Studies investigating the associations between histories of childhood maltreatment (CM) in parent-child dyads have primarily involved samples from high-income countries; however, CM rates are higher in low- and middle-income countries. The present study aimed to examine the (a) association between maltreatment in parents and maltreatment of their children through risk (i.e., parent depression) and protective (i.e., parent-child connectedness) factors and (b) associations between CM in children with aggression through posttraumatic stress symptoms (PTSS) and peer/sibling victimization. Participants were 227 parent-child dyads from Burundi, Africa, a low-income country. Parents were 18 years of age or older, and children were 12-18 years (M = 14.76, SD = 1.88, 57.7% female). Among parents, 20.7%-69.5% of participants reported a history of physical and emotional abuse and neglect; among children, the rates of sexual, physical, and emotional abuse ranged from 14.5% to 89.4%. A history of CM in parents was associated with CM in children, B = 0.19, p < .01, and CM in parents was indirectly associated with CM in children through parent-child connectedness, β = .04, 95% CI [.01, .10], and parental depression, β = .08, 95% CI [.03, .15]. In children, maltreatment was positively associated with peer/sibling victimization, and CM was associated with aggression, β = .07, 95% CI [.04, 0.11], through PTSS but not via peer/sibling victimization. Continued efforts to improve CM-related preventive strategies and the accessibility of prevention services are needed to reduce CM in low-income countries such as Burundi.

Association between Bullying Victimization and Symptoms of Depression among Adolescents: A Moderated Mediation Analysis

BACKGROUND

Bullying victimization and its effect on symptoms of depression have received attention from researchers, but few studies have considered the potential mechanism. The aim of this study was to examine a moderated mediation model for the association between bullying victimization and depressive symptoms in terms of it being mediated by social anxiety, and investigated whether sleep duration would show moderating effects in this relationship.

METHODS

In this study, there were 2956 students, who completed three questionnaires, including a bullying victimization scale, as well as a social anxiety and epidemiologic studies depression scale.

RESULTS

Bullying victimization's effects on depressive symptoms were mediated by social anxiety. Furthermore, sleep duration moderated the relationship between bullying victimization and depressive symptoms.

CONCLUSIONS

The research contributes by clarifying the mechanisms underlying the relationship between bullying victimization and depressive symptoms.

Characteristics of adolescent boys who have displayed harmful sexual behaviour (HSB) against children of younger or equal age

Background

Adolescents who have displayed harmful sexual behaviour (HSB) are often described as a heterogeneous population, but different offender-, offense-, or victim-based typologies have been proposed. Two common typologies are based on the victim’s age and/or on offender–victim age discrepancies.

Methods

Using data from a Norwegian clinical sample, we aimed to investigate the characteristics of two subgroups of adolescents: those with younger/child victims (HSB-C) and peer victims (HSB-P). The sample was collected from a public child and adolescent psychiatry outpatient clinic. N = 54 boys, mean age 14.1 (younger age: HSB-C, n = 30, equal age: HSB-P, n = 24). Based on patient records, all patient registries within the sample were reviewed retrospectively. The data were analysed in R with different statistical tests (e.g. N − 1 chi-square test, Fisher’s exact test).

Results

After adjusting the p values for multiple comparisons, none of the test statistics showed significant results. Based on the magnitude of the effect-size estimates, the following tendencies and potential meaningful differences emerged: more adolescents in the HSB-C group had experienced their own trauma early (V = 0.42), had more than one victim (V = 0.32), and had displayed repeated HSB (V = 0.27), and their caregivers required extensive interventions (V = 0.20). More adolescents in the HSB-P group had cognitive abilities in the normal/high range (V = 0.32), and their caregivers more often had difficulties acknowledging the need for support and treatment (V = 0.20).

Conclusions

The nonsignificant differences between the subgroups, despite some strong and moderate effects, bring about a discussion on the utility of using “victim age” in combination with the “offender–victim age differences” as the sole classification criterion for adolescents who have displayed HSB. The heterogeneity of the adolescent HSB population and lack of reliable information on more homogenous subgroups dynamics will remain challenges for clinicians and other practitioners needing a broad assessment and intervention focus.

Victimized for Being Different: Young Adults With Disabilities and Peer Victimization in Middle and High School

Children who are victims of peer aggression can suffer negative emotional, academic and physical consequences that can last into adulthood. Previous research indicates children with disabilities are victimized up to 4 times as often as children without disabilities. However, their unique needs are often not considered in the design and implementation of prevention interventions. The current study examined the perceived effects of family, peer, and school support among children with disabilities to protect them from or help them cope with peer victimization. In this retrospective study, college students registered with a university Disability Resource Center (n = 161) completed an electronic survey about their recollections of peer victimization and of factors that protected them during middle and high school. Three subscales of the Social and Emotional Health Survey measured perception of family, peer, and school support. In open-ended questions, students described instances of peer victimization and of protection. Results indicated that two thirds of participants experienced peer victimization. The most frequently reported type of aggression was relational, followed by verbal. Frequency of victimization did not differ by gender. Most participants experienced victimization related to their disabilities or related to a combination of disability with another personal characteristic. Participants who reported higher levels of family and peer support experienced significantly less peer victimization. Coping with victimization took many forms such as withdrawing from peers, listening to music, and mental health treatment. Unexpectedly, some participants reported disability-related victimization from school staff. Findings highlight the high frequency of victimization and the value of educating parents, school personnel, and other students on strategies to support students with disabilities. These strategies could be incorporated into prevention programs.

Precursors of sibling bullying in middle childhood: Evidence from a UK-based longitudinal cohort study

BACKGROUND

There is increasing evidence that sibling bullying is associated with various social, emotional, and mental health difficulties. It is, however, unclear which factors predict sibling bullying in middle childhood and whether child-level individual differences make some children more susceptible to sibling bullying involvement.

OBJECTIVE

To investigate the precursors of sibling bullying in middle childhood in a UK based population sample.

PARTICIPANTS AND SETTING

Existing data from the prospective Millennium Cohort Study (N = 16,987) were used. Primary caregivers reported on precursors (child age 7 years or earlier) whilst children self-reported on sibling bullying (child age 11 years).

ANALYSIS

A series of multinomial logistic regression models were fitted. First, testing for crude associations between sibling bullying and the precursors individually. Culminating in a final model with the significant predictors from all of the previous models.

RESULTS

Structural family-level characteristics (e.g. birth order, ethnicity, and number of siblings) were found to be the strongest predictors of sibling bullying involvement followed by child-level individual differences (e.g. emotional dysregulation and sex). Parenting and parental characteristics (e.g. primary caregiver self-esteem and harsh parenting) predicted sibling bullying, but to a lesser extent.

CONCLUSIONS

These findings suggest that structural family characteristics and child-level individual differences are the most important risk factors for sibling bullying. If causality can be established in future research, they highlight the need for interventions to be two-pronged: aimed at parents, focusing on how to distribute their time and resources appropriately to all children, and the children themselves, targeting specific sibling bullying behaviors.

The contribution of interpersonal violence victimization types to psychological distress among youth

BACKGROUND

Associations between different types of victimization and symptomology among youth remain unclear due to methodological limitations preventing the identification of the independent contribution of each type of violence.

OBJECTIVE

The purpose was to examine associations between different types of victimization and the odds of experiencing clinically significant levels of anxiety, depression, and anger/aggression. We also examined the unique contribution of each type of victimization to these outcomes.

PARTICIPANTS

Participants were a nationally representative sample of youth ages 10-17 (n = 1019) who were residing in the United States when data were collected in 2002-2003.

METHODS

Youth reported on their experiences of different forms of victimization (e.g., physical abuse, emotional abuse, neglect, sibling abuse, bullying, sexual assault, and witnessing violence) within the past year. Logistic regression and relative weights analyses were used to examine associations between victimization and symptoms of depression, anxiety, and anger/aggression.

RESULTS

The prevalence of reported victimization ranged from 1.3 % for neglect to 41.3% for sibling abuse. Physical and emotional child abuse, sibling abuse, bullying, and emotional bullying were associated with increased odds of clinically significant anxiety, depression, and anger/aggression. Witnessing parent intimate partner violence was associated with increased odds of clinically significant anger/aggression. Witnessing parental assault of a sibling was associated with increased odds of clinically significant anxiety and anger/aggression. Emotional bullying predicted the largest percentage of variance in anxiety and depression, followed by emotional abuse and sibling aggression.

CONCLUSIONS

These findings underscore the need for further assessment and treatment for sibling abuse and emotional bullying.

Sibling Bullying in Middle Childhood is Associated with Psychosocial Difficulties in Early Adolescence: The Case of Individuals with Autism Spectrum Disorder

Sibling bullying is associated with various psychosocial difficulties. We investigated this in 231 individuals with Autism Spectrum Disorder (ASD) and 8180 without ASD between middle childhood (age 11 years) and early adolescence (age 14 years). On the whole, self-reported sibling bullying decreased from middle childhood to early adolescence. Despite this, individuals with ASD continued to report more sibling bullying as both perpetrator and victim in early adolescence than those without ASD. We found that self-report sibling bullying in middle childhood was associated with psychosocial difficulties in early adolescence. Moreover, individuals with ASD were more likely to report being bullied by both siblings and peers in middle childhood and this pattern of victimisation was associated with concurrent and longitudinal psychosocial difficulties.

Peer Victimization Patterns and Trauma Symptoms in a National Longitudinal Sample of Youth

Using a nationally representative sample of 791 youth, ages 8-17 at baseline, this study identified patterns over a 2-year period in specific forms of peer victimization and examined differences in the mental health consequences of those patterns. Findings show that, among the victimized, physical assault had relatively high persistence compared to other forms, while physical intimidation and emotional bullying had relatively high rates of desistence. Emotional bullying at T1 was associated with increased risk of T2 Internet harassment and Internet harassment at T1 strongly predicted T2 dating violence. Patterns of victimization over time differed in their relationship with trauma symptoms. Findings emphasized the importance of recency and the distress of new victimization experiences, rather than the chronicity or repetition of victimization. Understanding variations in peer victimization patterns and outcomes over time can help to inform interventions that better target sources of risk across adolescence.

Predictors of sibling victimization and associations with self-perception and relationship attachment in adolescence

Research has shown that sibling victimization may be as detrimental to adolescent outcomes as peer victimization. However, many questions remain unanswered with regard to potential protective parenting factors and consequences sibling victimization among adolescents. This study tested a mediation model of sibling victimization with parental monitoring, a positive parenting factor, as a predictor and parent and peer-adolescent attachment as mediated by adolescent self-perceptions as potential outcomes. A three path mediation from parental monitoring → sibling victimization → adolescent self-perceptions → peer/parent-adolescent attachment was also tested. Structural Equation Modeling revealed that parental monitoring was negatively associated with sibling victimization only for girls. Sibling victimization had negative direct and indirect effects on parent- and peer-adolescent attachment via adolescent self-perceptions of social competence and self-worth. Findings suggest that parental monitoring may be important in the prevention of sibling victimization and self-perceptions may be an important point of intervention adolescents experiencing sibling victimization.

Association Between Sub-types of Sibling Bullying and Mental Health Distress Among Chinese Children and Adolescents

Sibling bullying is a common phenomenon in childhood and adolescence worldwide and has a significant association with mental health distress. However, there have been few studies that have examined the associations between any specific sub-type of sibling bullying and depression as well as anxiety. Besides, the association between sibling bullying and psychological well-being was never explored among the Chinese population. The purpose of this cross-sectional study was to examine the associations between the number of sub-types of sibling bullying involvement and depression as well as anxiety among Chinese children and adolescents. Multi-stage stratified cluster sampling was used to recruit 5,926 participants aged 10 to 18 who had at least one sibling living in the household. Different sub-types of sibling bullying involvement were determined by using Olweus Bully/Victim Questionnaire (OBVQ). The nine-item Patient Health Questionnaire (PHQ-9) and the seven-item Generalized Anxiety Disorder Scale (GAD-7) were used to screen clinical ranges of major depression and generalized anxiety disorder, respectively. Of the participants, 1,235 (20.8%) were bullied by siblings, and 1,230 (20.8%) perpetrated bullying behavior against siblings over the past 6 months. After controlling potential confounders, adjusted model of logistic regression analyses indicated that all three sub-types of sibling victimization and perpetration were significantly associated with both depression and anxiety. There were linear associations between the number of sub-types of sibling bullying victimization and depression (adjusted OR = 1.49, 95% CI 1.32 to 1.68) as well as anxiety (adjusted OR = 1.68, 95% CI 1.48 to 1.90). Besides, linear trends were found between the number of sub-types of sibling bullying perpetration and depression (adjusted OR = 1.44, 95% CI 1.26 to 1.64) as well as anxiety (adjusted OR = 1.63, 95% CI 1.42 to 1.87). The findings underline dose-response relationships between the number of sub-types of sibling bullying involvement and mental health distress. Intervention programs should be conducted to focus on developing mental health status of those children and adolescents who are involved in multiple sub-types of sibling victimization or perpetration.

The Independent and Cumulative Effects of Sibling and Peer Bullying in Childhood on Depression, Anxiety, Suicidal Ideation, and Self-Harm in Adulthood

Sibling and peer bullying are reported as the most frequent forms of violence experienced across childhood. There is now ample evidence indicating an association between sibling and peer bullying, with those reporting sibling bullying at an increased risk of peer bullying. While there is convincing evidence of a causative association between peer bullying and a range of mental health outcomes, sibling bullying continues to receive far less attention. The aim of this study was to explore whether sibling bullying roles (non-involved, victim, bully-victim, bully) in middle childhood were independently associated with clinical diagnoses of depression and anxiety and reports of suicidal ideation and self-harm in early adulthood. We further tested whether there was a cumulative relationship between involvement in sibling and peer bullying victimization. This study was based on up to 3,881 youth from the Avon Longitudinal Study of Parents and Children, a prospective birth-cohort based in the United Kingdom. Sibling and peer bullying was assessed via self-report when youth were 12 years of age, while depression, anxiety, suicidal ideation, and self-harm were assessed via self-administered computerized interviews at 24 years of age. Involvement as a sibling bully-victim was associated with clinical diagnosis of depression (OR = 1.91, 95% CI: 1.33-2.72), while sibling victims were at increased odds of both suicidal ideation (OR = 1.52; 95% CI, 1.16-1.98) as well as suicidal self-harm (OR = 2.20, 95% CI, 1.36-3.58) in early adulthood, even after accounting for concurrent peer bullying and a range of other pre-existing childhood confounders. Sibling and peer bullying were further associated in a homotypic manner. A dose-response relationship of bullying in the home and school across mental health outcomes was found. Youth victimized by both their siblings and peers displayed the highest odds of developing clinical depression, suicidal ideation, and self-harm. Children bullied at home and at school had no safe place to escape the bullying and torment. Our findings highlight the need for intervention studies tailored toward reducing sibling bullying, as these may hold large promise for alleviating a range of adverse outcomes, including the prevention of peer bullying, which may be contingent on early bullying experiences in the home environment.

The Prevalence and Psychopathological Correlates of Sibling Bullying in Children with and without Autism Spectrum Disorder

Using data from a prospective population based study, the prevalence and psychopathological correlates of sibling bullying in children with and without autism spectrum disorder (ASD) were estimated. There were 475 children with ASD and 13,702 children without ASD aged 11 years. Children with ASD were more likely to be bullied by their siblings compared to those without ASD. They were also more likely than those without ASD to both bully and be bullied by their siblings, which was associated with lower prosocial skills as well as more internalizing and externalizing problems compared to those not involved in any sibling bullying. Interventions to improve social and emotional outcomes in children with ASD should focus on both the affected and the unaffected sibling.

Differentiating typical from atypical perpetration of sibling-directed aggression during the preschool years

BACKGROUND

Sibling aggression is common and often viewed as benign. Although sibling aggression can be harmful for the victims, it may also be a marker of clinical risk for the aggressor. We differentiated typical from atypical levels of perpetration of sibling-directed aggression among preschoolers, a developmental period in which aggression is a normative misbehavior, by (a) identifying how frequently aggressive behaviors targeted at a sibling must occur to be psychometrically atypical; (b) mapping the dimensional spectrum of sibling-directed aggression from typical, more commonly occurring behaviors to rarer, more atypical, actions; and (c) comparing the psychometric atypicality and typical-to-atypical spectrum of sibling-directed aggression and peer-directed aggression.

METHODS

Parents (N = 1,524) of 3- (39.2%), 4-(36.7%), and 5-(24.1%) year-olds (51.9% girls, 41.1% African-American, 31.9% Hispanic; 44.0% below the federal poverty line) completed the MAP-DB, which assesses how often children engage in aggressive behaviors. We used item-response theory (IRT) to address our objectives.

RESULTS

Most aggressive behaviors toward siblings were psychometrically atypical when they occurred 'most days' or more; in contrast, most behaviors targeted at peers were atypical when they occurred 'some days' or more. With siblings, relational aggression was more atypical than verbal aggression, whereas with peers, both relational and physical aggression were more atypical than verbal aggression. In both relationships, the most typical behavior was a verbally aggressive action. Results were broadly replicated in a second, independent sample.

CONCLUSIONS

These findings are a first step toward specifying features of sibling aggression that are markers of clinical risk and belie the notion that sibling aggression is inherently normative.

Sibling bullying at 12 years and high-risk behavior in early adulthood: A prospective cohort study

Emerging evidence suggests that sibling aggression is associated with the development of high-risk behavior. This study investigated the relationship between sibling bullying perpetration and victimization in early adolescence and high-risk behavior in early adulthood. Sibling bullying was assessed at 12 years in 6,988 individuals from the Avon Longitudinal Study of Parents and Children, a birth cohort based in the UK and high-risk behavioral outcomes were assessed at 18-20 years. Frequent sibling bullying perpetration predicted antisocial behavior (OR = 1.74; 95%CI, 1.38-2.20), while frequent sibling bullying victimization increased the odds of nicotine dependence (OR = 2.87; 95%CI, 1.55-5.29), even after accounting for peer bullying and parent maltreatment. Categorical analysis revealed that particularly bullies and bully-victims were at risk of developing high-risk behavior. Finally, this study found that adolescents who were involved in bullying perpetration across multiple contexts (home and school) had the highest odds of reporting antisocial behavior (OR = 3.05; 95%CI, 2.09-4.44), criminal involvement (OR = 2.12; 95%CI, 1.23-3.66), and illicit drug use (OR = 2.11; 95%CI, 1.44-3.08). Findings from this study suggest that sibling bullying perpetration may be a marker of or a contributory factor along the developmental trajectory to antisocial behavior problems. Intervention studies are needed in order to test whether reducing sibling bullying can alleviate long-term adverse social and behavioral outcomes.

Sibling bullying in middle childhood and psychotic disorder at 18 years: a prospective cohort study

BACKGROUND

Being bullied by a sibling has been recently identified as a potential risk factor for developing depression and self-harm. It is unknown whether this risk extends to other serious mental health problems such as psychosis. We investigated whether sibling bullying victimization or perpetration in middle childhood was prospectively associated with psychotic disorder in early adulthood.

METHODS

The current study investigated 6988 participants of the Avon Longitudinal Study of Parents and Children, a UK community-based birth cohort. Sibling bullying was reported at 12 years and psychotic disorder was assessed via a semi-structured interview at 18 years.

RESULTS

Involvement in sibling bullying was associated with psychotic disorder in a dose-response fashion, even after controlling for a range of confounders. Those involved several times a week were 2-3 times more likely to meet criteria for a psychotic disorder [odds ratio (OR); 95% confidence interval (CI)]: victimization (OR 2.74; CI 1.28-5.87); perpetration (OR 3.16; CI 1.35-7.41). Categorical analysis indicated that particularly victims (OR 3.10; CI 1.48-6.50) and bully-victims (OR 2.66; CI 1.24-5.69) were at increased risk of psychotic disorder. Involvement in both sibling and peer bullying had a dose-effect relationship with a psychotic disorder, with those victimized in both contexts having more than four times the odds for a psychotic disorder (OR 4.57; CI 1.73-12.07).

CONCLUSION

Parents and health professionals should be aware of the adverse long-term effects of sibling bullying.

Health correlates, addictive behaviors, and peer victimization among adolescents in China

BACKGROUND

Peer victimization has been recognized as a common social problem affecting children and adolescents in all parts of the world. This study aims to examine the prevalence of different types of peer victimization and to evaluate the associations between peer victimization and health correlates.

METHODS

Using a large population sample of 18,341 adolescents aged 15-17 years from 6 cities in China, this study estimated the prevalence of different types of peer victimization, addictive behaviors, and health-related variables with self-administrated questionnaires. A three-phase logistical regression analysis was conducted to investigate the associations between peer victimization and addictive behaviors as well as health-related factors among adolescents.

RESULTS

A total of 42.9% of the surveyed Chinese adolescents have been bullied by peers, with boys reporting higher rate on overt victimization (36.9%) and girls on relational forms (33.9%). School environment (34.7%) was the most frequent scene of peer violence, followed by neighborhood, family, and internet. Addictive behaviors except substance abuse were found related to higher possibility of peer victimization (aOR 1.21-1.73, P < 0.001). Peer victimization was significantly associated with more depressive symptoms, post-traumatic stress disorder symptoms, and suicide ideation and deliberate self-harm (aOR 1.05-2.27, P < 0.001), and poorer self-esteem and health-related quality of life (aOR 0.95-0.97, P < 0.001).

CONCLUSION

Possible explanations of the associations found in this study are discussed and implications for future services are raised.

Parent- and Sibling-Directed Aggression in Children of Domestic Violence Victims

This study examines the nature of parent- and sibling-directed aggression and involvement in other victimization among children living with female caregivers in a domestic violence shelter. Caregivers were interviewed about their children's (N = 79; M_age = 9.0 years) parent- and sibling-directed aggression. Physical and verbal aggression and emotional blackmail were the most common forms of aggression against caregivers. Physical and verbal aggression were most common against siblings. No age or gender differences in aggression characteristics were found. A large minority of children displayed both parent- and sibling-directed aggression. Children exhibiting parent- or sibling-directed aggression were significantly more likely to be victimized. Findings highlight the importance of incorporating parent- and sibling-directed aggression into definitions of family violence and recognizing children can be victims and victimizers.

The Combination of Sibling Victimization and Parental Child Maltreatment on Mental Health Problems and Delinquency

This study examined how the combination of sibling victimization and parental child maltreatment is related to mental health problems and delinquency in childhood and adolescence. Co-occurrence, additive associations, and interactive associations of sibling victimization and parental child maltreatment were investigated using a sample of 2,053 children aged 5-17 years from the National Survey of Children's Exposure to Violence. The results provide primarily evidence for additive associations and only suggest some co-occurrence and interactive associations of sibling victimization and child maltreatment. Evidence for co-occurrence was weak and, when controlling for the other type of maltreatment, only found for neglect. Sibling victimization was related to more mental health problems and delinquency over and above the effect of child abuse and neglect. Moderation by sibling victimization depended on child age and was only found for the relation between both types of child maltreatment by parents and delinquency. For mental health, no interactive associations were found. These results highlight the unique and combined associations between sibling victimization on child development.

A pernicious cycle: Finding the pathways from child maltreatment to adolescent peer victimization

The purpose of this study was to identify the pathways from childhood physical and sexual abuse to adolescent physical and sexual victimization by assessing behavior symptoms (both internalizing and externalizing) and peer popularity as potential mediating variables. The data derive from Longitudinal Studies of Child Abuse and Neglect (LONGSCAN), which tracks the consequences of child abuse and neglect using five study sites across the US. Child physical and sexual abuse was measured at age 12 using self-reports of life-time maltreatment experiences. Internalizing and externalizing symptoms were assessed at age 12 using the Child Behavior Checklist (CBCL). Peer popularity was assessed at age 14 by teachers. Peer victimization was assessed at age 16 using the modified version of the Juvenile Victimization Questionnaire. The results indicated that physical abuse had no direct effect on either physical or sexual peer victimization, whereas sexual abuse had significant direct effect on both physical and sexual victimization. Assessed at age 12, children who had been physically or sexually maltreated were found to have higher levels of internalizing and externalizing symptoms. These increased symptoms are associated with lower peer popularity at age 14, which in turn is associated with greater physical and sexual peer victimization at age 16. The findings suggest that multiple points for interventions may exist to disrupt the cycle of victimization. Early assessment and treatment for externalizing symptoms and for low peer popularity may be helpful in preventing physical peer victimization among adolescents who have been physically and/or sexually abused.

The State of Interventions for Sibling Conflict and Aggression: A Systematic Review

Sibling conflict and aggression is often a pervasive part of family life that parents want help managing and can have negative effects on children's well-being. The purpose of this systematic review is to evaluate current research regarding programs to reduce sibling conflict and aggression and promote positive sibling relationships. Online databases, reference lists, and Google Scholar were searched using key words and inclusion/exclusion criteria were applied. The search located five unique studies of programs focused on school-aged children. Heterogeneity of the studies precluded meta-analysis, but characteristics of the studies were systematically described. Three interventions were aimed at directly improving children's social skills and two interventions trained parents on mediation techniques to use during sibling conflicts. Overall, of the four studies that included assessment of children's social skills, the results were positive. Two of the three studies that evaluated sibling relationship quality demonstrated improved sibling interactions compared with the control group. With further research and evidentiary support, these programs have promise to modify sibling behaviors as part of current parenting education programs or as a stand-alone program to address sibling conflict and aggression.

Temporal patterns and predictors of bullying roles among adolescents in Vietnam: a school-based cohort study

Although many cross-sectional studies have examined bullying experiences and correlated factors among adolescents in schools, relatively little is known about the extent to which bullying roles are stable or fluid over time. This short-term quantitative longitudinal study in Vietnam examined temporal patterns and predictors of bullying roles over an academic year. A total of 1424 middle and high school students aged 12-17 years completed two anonymous, self-administered questionnaires six months apart in 2014 and 2015. Young people were classified into different bullying roles as follow: not-involved (38.9%), victims only (24%), bullies only (6.6%), and bully-victims (40.4%) across the two times. About 60% of all surveyed students experienced bullying either as victim, bully, or bully-victim during the year. Of these students, nearly three in four indicated unstable bullying roles over time. Multivariate multinomial logistic regressions indicated factors ranging from individual (age, gender, and mental health) to family (social support, parental supervision and monitoring, witnessing parental violence, and conflict with siblings), school (perceived social support, teachers' attempt to stop bullying at school), and peers (social support, students' attempt to stop bullying at school) have significant associations with levels of bullying involvement. Implications for bullying prevention programs nationally and internationally are discussed.

The cycle of victimization: The relationship between childhood maltreatment and adolescent peer victimization

Child maltreatment has been demonstrated to have many short- and long-term harmful consequences for victims, but whether or not child abuse is associated with an increased risk of peer victimization during adolescence is unclear. This study analyzed prospective data from 831 children and parents participating in the Longitudinal Studies on Child Abuse and Neglect (LONGSCAN) to investigate the relationships between child physical and sexual abuse and adolescent victimization by peers, as well as the potential for gender to moderate these relationships. Results from ordinal logit regression models indicated that children who were physically abused prior to age 12, based on official reports, parent reports, and child reports, had a greater risk of experiencing more intimidation and physical assault by peers at age 16. Having a history of sexual abuse predicted more physical assault but not intimidation. There was no evidence that gender moderated these relationships; in all cases, the relationship between abuse and revictimization was similar for boys and girls. The findings emphasize the need to provide victims of abuse with assistance to help prevent a cycle of victimization.

Friendships and Family Support Reduce Subsequent Depressive Symptoms in At-Risk Adolescents

BACKGROUND

Early life stress (ELS) consists of child family adversities (CFA: negative experiences that happened within the family environment) and/or peer bullying. ELS plays an important role in the development of adolescent depressive symptoms and clinical disorders. Identifying factors that may reduce depressive symptoms in adolescents with ELS may have important public mental health implications.

METHODS

We used structural equation modelling and examined the impact of adolescent friendships and/or family support at age 14 on depressive symptoms at age 17 in adolescents exposed to ELS before age 11. To this end, we used structural equation modelling in a community sample of 771 adolescents (322 boys and 477 girls) from a 3 year longitudinal study. Significant paths in the model were followed-up to test whether social support mediated or moderated the association between ELS and depressive symptoms at age 17.

RESULTS

We found that adolescent social support in adolescence is negatively associated with subsequent depressive symptoms in boys and girls exposed to ELS. Specifically, we found evidence for two mediational pathways: In the first pathway family support mediated the link between CFA and depressive symptoms at age 17. Specifically, CFA was negatively associated with adolescent family support at age 14, which in turn was negatively associated with depressive symptoms at age 17. In the second pathway we found that adolescent friendships mediated the path between peer bullying and depressive symptoms. Specifically, relational bullying was negatively associated with adolescent friendships at age 14, which in turn were negatively associated with depressive symptoms at age 17. In contrast, we did not find a moderating effect of friendships and family support on the association between CFA and depressive symptoms.

CONCLUSIONS

Friendships and/or family support in adolescence mediate the relationship between ELS and late adolescent depressive symptoms in boys and girls. Therefore, enhancing affiliate relationships and positive family environments may benefit the mental health of vulnerable youth that have experienced CFA and/or primary school bullying.

Bullying in the family: sibling bullying

Sibling relationships have a substantial and lasting effect on children's development. Many siblings experience some occasional conflict, however, up to 40% are exposed to sibling bullying every week, a repeated and harmful form of intrafamilial aggression. We review evidence on the precursors, factors relating to peer bullying, and mental health consequences of sibling bullying. Parenting quality and behaviour are the intrafamilial factors most strongly associated with bullying between siblings. Sibling bullying increases the risk of being involved in peer bullying, and is independently associated with concurrent and early adult emotional problems, including distress, depression, and self-harm. The effects appear to be cumulative, with those children bullied by both siblings and peers having highly increased emotional problems compared with those bullied by siblings or peers only, probably because they have no safe place to escape from bullying. The link between sibling and peer bullying suggests interventions need to start at home. Health professionals should ask about sibling bullying and interventions are needed for families to prevent and reduce the health burden associated with sibling bullying.

Association among number, order and type of siblings and adolescent mental health at age 12

BACKGROUND

Although the sibling relationship is a unique one, the effects of the number and type of siblings on mental health among adolescents have not been reported.

METHODS

Japanese children (total, 9276; boys, 4654; girls, 4622), all 12 years old, and from the Japanese Toyama Birth Cohort Study, were followed up until 2002. Subject self-reported mental health was obtained from the Japanese version of the Dartmouth Primary Care Co-operative Project (COOP) charts. The associations between number and type of siblings and self-reported mental health were examined.

RESULTS

There was a significant difference in mental health between different sibling pairs, with brother pairs and brother/sister pairs having a positive effect on adolescent mental health, compared with those in sister pairs. Girls with brothers had better self-reported mental health than those without. The adjusted OR of good mental health was 1.44 (95%CI:1.00-2.08) for those with an older brother and 1.67 (95%CI: 1.17-2.38) for those with a younger brother compared with those without. Boys with a younger sister had a higher OR of good self-reported health than those without (OR, 1.62; 95%CI: 1.08-2.43).

CONCLUSIONS

Children with siblings had better mental health status than those without, which has practical implications for Asian countries and worldwide considering the declining fertility.

Sibling relationships as sources of risk and resilience in the development and maintenance of internalizing and externalizing problems during childhood and adolescence

Sibling relationships are a unique and powerful context for children's development, characterized by strong positive features, such as warmth and intimacy, as well as negative qualities like intense, potentially destructive conflict. For these reasons, sibling interactions may be both a risk and a protective factor for the development and maintenance of emotional and behavioral dysfunction. We review evidence indicating that sibling interactions are linked to internalizing and externalizing symptoms and identify possible mechanisms for these associations. Sibling conflict contributes uniquely to symptomatology and may be particularly problematic when accompanied by lack of warmth, which is generally associated with decreased internalizing and externalizing problems. On the other hand, greater warmth can be associated with heightened externalizing symptoms for later-born children who may model the behavior of older siblings. Although it will be important to monitor for increased sibling collusion, several intervention studies demonstrate that it is possible to reduce conflict and increase warmth between brothers and sisters, and that improving sibling interactions can teach children social-cognitive skills that are beneficial in other relationships (e.g., friendships). Developing brief assessment tools differentiating normative from pathogenic sibling conflict would assist clinical decision making. Future intervention work could provide a more stringent test of the hypothesis that strengthening sibling relationships improves children's socio-emotional adjustment.