Anger, hostility, internalizing negative emotions, and intimate partner violence perpetration: A meta-analytic review

Factors associated with hostility among people living with HIV/AIDS in Northeast China: a cross-sectional study

Background

Hostility can result in negative outcomes in people living with HIV/AIDS (PLWHA); however, previous research on this topic is far from adequate. To contribute to existing knowledge on this aspect of PLWHA, the current study examined the prevalence of hostility and its potential influencing factors among PLWHA.

Methods

A cross-sectional questionnaire survey was undertaken on 218 HIV patients in Heilongjiang Province of China between March and August in 2013. A multiple logistic regression analysis was performed to identify factors associated with hostility.

Results

The prevalence of hostility was 17.0% among the participants. The three most alarming types of hostility included desiring to kill the person who infected them, blaming the infection on the society, and abandoning themselves to despair. A multiple logistic regression model identified that depression (OR = 3.845, 95% CI = 1.309–9.229), perceived stigma (OR = 3.281, 95% CI = 1.109–7.711), and fear of dying (OR = 2.710, 95% CI = 1.068–6.881) were the risk factors for hostility, while higher levels of trust-in-doctor (OR = 0.176, 95% CI = 0.060–0.517) and per capita household income (OR = 0.344, 95% CI = 0.119–0.991) were protective factors.

Conclusions

Our findings highlight the prominent influence of psychological, healthcare, and social factors on hostility among PLWHA. Interventions specifically targeted to reduce hostility should be provided, including incorporating psychological service into HIV management guidelines, enhancing PLWHA’s trust-in-doctor, establishing comprehensive services for PLWHA, reducing the social stigma against PLWHA, and paying more attention to PLWHA with financial problems. These interventions may improve the management and control of HIV/AIDS.

Comparison of the CADRI and CTS2 for Measuring Psychological and Physical Dating Violence Perpetration and Victimization

Advancing dating violence (DV) research requires consistent conceptualization and measurement. However, empirical sudies on the measurement of psychological and physical DV perpetration and victimization are uncommon. There were three aims of the current study: (a) to examine the construct validity of psychological and physical DV perpetration and victimization on the Conflict in Adolescent Dating Relationships Inventory (CADRI) and Revised Conflict Tactics Scales (CTS2) using factor analysis; (b) to compare empirically derived DV scales with ones using face valid definitions of psychological and physical DV within each measure; and (c) to compare results obtained from the CADRI with those obtained from the CTS2. A diverse sample of undergraduates (N = 512; 63.9% female, 50.0% White, 16.2% Black, and 22.9% Latino) completed an online survey. There were two-factor solutions for each survey and DV perpetration and victimization: moderate psychological DV and severe psychological/physical DV on the CADRI; and moderate psychological and physical DV and severe psychological and physical DV on the CTS2. Multiple regression analyses showed that results were similar for empirically and rationally derived scoring methods with one exception: On the CTS2, risk factors associated with moderate DV were not the same as those associated with psychological DV. Moreover, the unique contribution of risk factors to each form of DV depended on which survey was used. In multivariate studies of risk factors associated with psychological and physical DV, the CADRI and CTS2 do not appear to be interchangeable, and may lead to different conclusions about the relative importance of risk factors.

Trauma Cognitions and Partner Aggression: Anger, Hostility, and Rumination as Intervening Mechanisms

OBJECTIVE

Previous research has demonstrated a significant association between trauma and intimate partner aggression (IPA) perpetration. However, the precise mechanisms underlying this relationship have yet to be fully elucidated. In the present study, we examined the impact of several key factors implicated in Ehlers and Clark's (2000) cognitive model of trauma (i.e., trauma cognitions, anger, hostility, and rumination) on IPA perpetration.

METHOD

Participants in this study were 271 male and female heavy drinkers at high risk for IPA from the community who completed measures of dysfunctional posttraumatic cognitions, dispositional rumination, trait anger and hostility, and IPA perpetration. A moderated mediational model was tested to determine how these variables interact to predict IPA perpetration.

RESULTS

Results indicated that anger and hostility mediated the effect of negative cognitions about the world on IPA perpetration, with this indirect effect being stronger for individuals with higher levels of rumination.

CONCLUSION

These findings suggest that cognitive and affective processes that may result from trauma exposure are associated with IPA and should be targeted in prevention and intervention programs for individuals at risk for perpetration.

Examining intersections between violence against women and violence against children: perspectives of adolescents and adults in displaced Colombian communities

BACKGROUND

Research examining the interrelated drivers of household violence against women and violence against children is nascent, particularly in humanitarian settings. Gaps remain in understanding how relocation, displacement and ongoing insecurity affect families and may exacerbate household violence.

METHODS

Employing purposive sampling, we used photo elicitation methods to facilitate semi-structured, in-depth interviews with female and male adolescents and adults aged 13-75 (n = 73) in two districts in Colombia from May to August of 2017. Participants were displaced and/or residing in neighborhoods characterized by high levels of insecurity from armed groups.

RESULTS

Using inductive thematic analysis and situating the analysis within a feminist socioecological framework, we found several shared drivers of household violence. Intersections among drivers at all socioecological levels occurred among societal gender norms, substance use, attempts to regulate women's and children's behavior with violence, and daily stressors associated with numerous community problems. A central theme of relocation was of family compositions that were in continual flux and of family members confronted by economic insecurity and increased access to substances.

CONCLUSIONS

Findings suggest interventions that systemically consider families' struggles with relocation and violence with multifaceted attention to socioecological intersections.

Psychometric parameters of the subscale of hostility from the Symptom Checklist 90 (SCL-90)

Abstract The present study aimed to know the psychometric parameters of the SCL-90 hostility scale. For this, two studies were traced; In Study 1, 209 students, mean age 16 years (SD = 1.29), who responded to the Scale of Hostility and a sociodemographic questionnaire. The exploratory factorial analysis indicated a unidimensional structure, whose Cronbach’s alpha was.71. In Study 2, we sought to find additional evidence of validity and reliability counting with 212 students with a mean age of 16 years (SD = 1.19). The confirmatory factorial analysis tested the unifactorial structure and pointed to good adjustment indexes; good internal consistency and composite reliability were also observed. In general, the Scale of Hostility provided evidence of satisfactory validity and reliability.

Racial Discrimination as a Risk Factor for African American Men's Physical Partner Violence: A Longitudinal Test of Mediators and Moderators

Although researchers have explored negative individual consequences of racial discrimination, very little work has examined the connection between discrimination and intimate partner violence (IPV) among African American men. Existing work tends to be cross-sectional and does not specify mediators or moderators that might explain this link. Thus, in the current study, we use longitudinal, prospective data from 200 young men to examine potential mediators and moderators of this association. Results demonstrated that anger and hostile attribution bias mediate the association between racial discrimination and IPV perpetration. Both corporal punishment and authoritative parenting acted as moderators, but the patterns of influence differed.

Converging drivers of interpersonal violence: Findings from a qualitative study in post-hurricane Haiti

OBJECTIVE

Interpersonal violence affecting women and children is increasingly recognized as a public health priority in humanitarian emergencies. Yet, research and intervention efforts have been fragmented across gender-based violence and child protection sectors. Using data from the Transforming Households: Reducing Incidence of Violence in Emergencies (THRIVE) project, this study sought to qualitatively investigate the intersecting drivers of multiple forms of violence in Côteaux, Haiti, while obtaining insight on how these drivers may be influenced by a humanitarian emergency.

METHODS

This analysis used transcripts obtained using a photo elicitation approach over the course of three sessions per person. Thirty-six individuals participated in the study: eight adult females, ten adult males, eight adolescent females, ten adolescent males. Participants were given cameras to capture images related to family relationships, family safety, and changes to family dynamics due to Hurricane Matthew and its aftermath. In subsequent sessions, these photographs were used as prompts for qualitative interviews.

RESULTS

Multiple and converging drivers of interpersonal violence were identified including the accumulation of daily stressors, loss of power/control, learned behavior (intergenerational cycle of abuse), and inequitable gender norms, all of which were influenced by the humanitarian context caused by Hurricane Matthew.

CONCLUSIONS

Our findings suggest multiple and converging drivers of violence may be exacerbated in times of crises, requiring interdisciplinary responses. In order to comprehensively address the drivers of violence, practitioners and policy makers should consider the needs of individuals and their families holistically, integrating community-led, gender transformative efforts and positive parenting with basic needs provision.

Dimensions of Anger Reactions-Revised (DAR-R): Validation of a brief anger measure in Australia and Spain

OBJECTIVE

A validated, brief measure of anger is needed in clinical settings to screen for problematic anger. This study examined the validity of the seven-item Dimensions of Anger Reactions-Revised (DAR-R), including a version for the Spanish population.

METHOD

Multiple psychometric instruments administered to 541 (76.6% female) adults in Australia and 1,115 (56.3% female) in Spain were analyzed.

RESULTS

A two-factor model (anger response and anger impairment) was confirmed. Concurrent, convergent, and discriminant validity were supported. Anger response items strongly correlated with established measures of anger/aggression State-Trait Anger Expression Inventory (Aggression Questionnaire), whereas anger impairment items strongly correlated with anxiety Generalized Anxiety Disorder-7 and depression Patient Health Questionnaire-9 measures. Internal consistency and test-retest reliability (3 months) were good. Cut-off scores for problematic anger were established. There were no gender differences in anger in the Spanish sample, but Australian males had higher anger scores than females.

CONCLUSION

Results substantiate the utility of the DAR-R as a concise, clinically informative measure of anger.

Understanding the Role of Alcohol, Anxiety, and Trait Mindfulness in the Perpetration of Physical and Sexual Dating Violence in Emerging Adults

This study examines alcohol consumption, anxiety, trait mindfulness, and physical and sexual dating violence aggression (PDV and SDV) among 735 emerging adults (18-25 years) in an urban emergency department. Of the total sample, 27.2% perpetrated PDV and 16.5% perpetrated SDV. Alcohol was positively associated with PDV/SDV. Anxiety was positively associated with PDV. Mindfulness was negatively associated with PDV/SDV. Interaction analyses revealed women had lower PDV with higher nonjudgment facet of mindfulness. Higher act aware was associated with lower PDV regardless of high versus low alcohol. Findings indicate different contributing factors among perpetrators of PDV/SDV; some factors may be attenuated by mindfulness.

Personality, Schizophrenia, and Violence: A Longitudinal Study

The aims of this study were (a) to investigate the presence of clinically significant personality traits and personality disorders (PD) in patients living in residential facilities, with or without a history of violence (69 and 46, respectively); and (b) to investigate any associations between clinically significant personality traits and PDs, aggression, impulsivity, hostility, and violent behavior during a 1-year follow-up. The most frequent primary diagnoses were schizophrenia (58.3%) and PD (20.9%). Those with a history of violence demonstrated more antisocial and alcohol dependence features and lower depressive PD symptoms than the control group. Hostility levels, antisocial symptoms, and drug dependence, as well as a Structured Clinical Interview for DSM-IV Axis II diagnosis of PD, predicted aggressive and violent behavior during follow-up. The study confirms the relevance of assessing PDs both to evaluate the risk of violent behavior and to plan appropriate preventive and treatment intervention.

A Study Space Analysis and Narrative Review of Trauma-Informed Mediators of Dating Violence

Research linking child maltreatment and dating violence in adolescence and emerging adulthood has proliferated in the past two decades; however, the precise mechanisms by which these experiences are related remain elusive. A trauma-informed perspective suggests four particularly promising mediators: maladaptive attachment, emotion regulation difficulties, emotional distress, and hostility. The current article characterizes the status of the empirical literature examining these four mediators using a study space analysis and a narrative review of existing research. An extensive literature search identified 42 papers (44 studies) that met the following criteria: (1) at least one measure of child maltreatment (emotional, physical, sexual, neglect, or exposure to intimate partner violence); (2) a measure of one of the four mediator variables; (3) a measure of dating violence perpetration or victimization; and (4) a sample of adolescents or young adults. The study space analysis suggested several important observations about the research on this topic, including a dearth of studies examining hostility as a mediator and little research using prospective designs or clinical samples. There are also limitations with the conceptualization and measurement of dating violence, child maltreatment, and some of the mediator variables. In addition, few studies examined more than one mediator variable in the same study. The narrative review suggested that maladaptive attachment (specifically insecure attachment styles), emotion regulation difficulties (specifically regulation of the emotion of anger), and emotional distress construed broadly represent promising mediators of the association between child maltreatment and dating violence, but conclusions about mediation must remain tentative given the state of the literature. The discussion offers recommendations for improved theoretical and empirical rigor to advance future research on mechanisms linking child maltreatment and dating violence.

Effects of Alcohol on Human Aggression

There is little debate that alcohol is a contributing cause of aggressive behavior. The extreme complexity of this relation, however, has been the focus of extensive theory and research. And, likely due to this complexity, evidence-based programs to prevent or reduce alcohol-facilitated aggression are quite limited. We integrate I3 Theory and Alcohol Myopia Theory to provide a framework that (1) organizes the myriad instigatory and inhibitory factors that moderate the effect of alcohol on aggression, and (2) highlights the mechanisms by which alcohol facilitates aggression among at-risk individuals. This integrative framework provides the basis for understanding the appropriate targets for prevention and intervention efforts and may serve as a catalyst for future research that seeks to inform intervention development.

Antisocial Traits, Distress Tolerance, and Alcohol Problems as Predictors of Intimate Partner Violence in Men Arrested for Domestic Violence

OBJECTIVE

Men with antisocial personality disorder (ASPD) traits are at an increased risk for consuming alcohol and perpetrating intimate partner violence (IPV). However, previous research has neglected malleable mechanisms potentially responsible for the link between ASPD traits, alcohol problems, and IPV perpetration. Efforts to improve the efficacy of batterer intervention programs (BIPs) would benefit from exploration of such malleable mechanisms. The present study is the first to examine distress tolerance as one such mechanism linking men's ASPD traits to their alcohol problems and IPV perpetration.

METHODS

Using a cross-sectional sample of 331 men arrested for domestic violence and court-referred to BIPs, the present study used structural equation modeling to examine pathways from men's ASPD traits to IPV perpetration directly and indirectly through distress tolerance and alcohol problems.

RESULTS

Results supported a two-chain partial mediational model. ASPD traits were related to psychological aggression perpetration directly and indirectly via distress tolerance and alcohol problems. A second pathway emerged by which ASPD traits related to higher levels of alcohol problems, which related to psychological aggression perpetration. Controlling for psychological aggression perpetration, neither distress tolerance nor alcohol problems explained the relation between ASPD traits and physical assault perpetration.

CONCLUSION

These results support and extend existing conceptual models of IPV perpetration. Findings suggest intervention efforts for IPV should target both distress tolerance and alcohol problems.

Angry thoughts in Spanish drivers and their relationship with crash-related events. The mediation effect of aggressive and risky driving

Several studies have related aggressive and risky driving behaviours to accidents. However, the cognitive processes associated with driving aggression have received very little attention in the scientific literature. With the aim of shedding light on this topic, the present research was carried out on a sample of 414 participants in order to validate the Driver's Angry Thoughts Questionnaire (DATQ) with a sample of Spanish drivers and to test the hypothesis of the mediation effect of aggressive and risky driving on the relationship between drivers' angry thoughts and crash-related events. The results showed a good fit with the five-factor model of the questionnaire (Judgmental and Disbelieving Thinking, Pejorative Labelling and Verbally Aggressive Thinking, Revenge and Retaliatory Thinking, Physically Aggressive Thinking, and Coping Self-Instruction). Moreover, slight gender differences were observed in drivers' angry thoughts, with women scoring higher than men (η²=0.03). However, younger drivers had higher scores than older drivers in general (η²=0.06). Finally, several mediation effects of aggressive driving and risky driving on the relationship between aggressive thinking and the crash-related events were found. Implications of the results for research in traffic psychology and clinical assessment of aggressive drivers as well as limitations of the study are discussed.

Role of offender perception in treatment outcome

Purpose

The purpose of this paper is to address a possible interaction of cognitive distortions associated with substance dependency and intimate partner violence (IPV), and the effects on subsequent behavior. The primary focus was to investigate the relationship between offender perception (i.e. perception of family problems (FP) and perception of need for treatment for family problems (FPTx)) and treatment outcome (i.e. substance use and violence), among a unique sample of substance dependent male offenders of IPV. An additional investigation included the change in perception from baseline to the end of treatment.

Design/methodology/approach

In total, 63 participants were randomly assigned to one of two treatment conditions and assessed across 12 weeks of treatment.

Findings

Participants in the (FP+) (i.e. those who perceived family problems at baseline) and (FPTx+) (i.e. those who perceived a need for treatment for family problems at baseline) conditions reported a significantly greater change in the number of days of violence from baseline to the end of treatment, compared to participants in the (FP−) (i.e. those who did not perceive family problems at baseline) and (FPTx−) (i.e. participants who perceived no need for treatment at baseline) conditions. (FP+) and (FPTx+) participants had significant decreases in any violent behavior from pre- to post-treatment.

Originality/value

The results of this study highlight the importance of techniques aimed at improving clients’ ability to recognize and admit to problem behaviors, a critical component of cognitive-behavioral therapy, in an effort to increase their motivation for treatment, thus leading to greater treatment success.

Violence against women

Violence against women causes suffering and misery to victims and their families and places a heavy burden on societies worldwide. It mostly happens within intimate relationships or between people known to each other. Violence against women is a social construction based on a societal consensus about the roles and rights of men and women. Two prevalent forms of violence against women are physical and sexual victimization by an intimate partner, and sexual victimization outside intimate relationships. Explanations of why men engage in aggressive behavior toward women address different levels, including the macro level of society, the micro level of dyadic interactions, and the individual level of perpetrator characteristics. Prevention efforts are needed that address each of these levels.

Deconstructing the associations between executive functioning, problematic alcohol use and intimate partner aggression: A dyadic analysis

INTRODUCTION AND AIMS

Problematic drinking and executive functioning deficits are two known risk factors for intimate partner aggression (IPA). However, executive functioning is a multifaceted construct, and it is not clear whether deficits in specific components of executive functioning are differentially associated with IPA perpetration generally and within the context of problematic alcohol use. To address this question, the present study investigated the effects of problematic drinking and components of executive functioning on physical IPA perpetration within a dyadic framework.

DESIGN AND METHODS

Participants were 582 heavy drinking couples (total n = 1164) with a recent history of psychological and/or physical IPA recruited from two metropolitan cities in the USA. Multilevel models were used to examine effects within an actor-partner interdependence framework.

RESULTS

The highest levels of physical IPA were observed among actors who reported everyday consequences of executive functioning deficits related to emotional dysregulation whose partners were problematic drinkers. However, the association between executive functioning deficits related to emotional dysregulation and IPA was stronger towards partners who were non-problematic drinkers relative to partners who were problematic drinkers. No such effect was found for executive functioning deficits related to behavioural regulation.

DISCUSSION AND CONCLUSIONS

Results provide insight into how problematic drinking and specific executive functioning deficits interact dyadically in relation to physical IPA perpetration. [Parrott DJ, Swartout KM, Eckhardt CI, Subramani OS. Deconstructing the associations between executive functioning, problematic alcohol use and intimate partner aggression: A dyadic analysis. Drug Alcohol Rev 2017;36:88-96].

A Review of Domestic Violence Perpetrator Programs in the United Kingdom

The aim of this study was to conduct a review of current intimate partner violence (IPV) perpetrator provision within the United Kingdom. The objective of the review was to explore the characteristics of intervention programs currently within the United Kingdom. Using a questionnaire-based design, we explored characteristics of current programs including program structure, program logistics, facilitator characteristics, and facilitator insights around the programs. A number of organizations completed the questionnaire (N = 21), and a review of existing literature was performed to explore the general characteristics of programs being delivered within the United Kingdom. Within the sample, we found that the feminist approach was still influential, but that facilitators also reported a need to ensure programs are more inclusive in their service provision to represent the diversity of perpetrators found. An unexpected finding from this study was the resistance of many organizations to engage with the research through an apparent suspicion of the agenda and motivation of the research team.

The Big Five Personality Traits and Intimate Partner Violence: Findings From a Large, Nationally Representative Sample

Intimate partner violence (IPV) is a major public health concern. Thus, it is vital to identify factors, such as individuals' personality traits, that may place men and women at risk for experiencing IPV. This study used data from Wave 4 of the National Longitudinal Study of Adolescent Health (N = 7,187), to examine the association between the Big Five personality traits and IPV perpetration and victimization among men and women. High openness, extraversion, and neuroticism emerged as the three most important risk factors associated with IPV. Although risk factors were found to be relatively similar for IPV perpetration and IPV victimization, some gender differences emerged, showing that extraversion was only connected to IPV for women but not for men. The present findings may bear important considerations for researchers and practitioners working with individuals and couples affected by IPV.

Psychological Abuse, Mental Health, and Acceptance of Dating Violence Among Adolescents

PURPOSE

Existing literature indicates that acceptance of dating violence is a significant and robust risk factor for psychological dating abuse perpetration. Past work also indicates a significant relationship between psychological dating abuse perpetration and poor mental health. However, no known research has examined the relationship between acceptance of dating violence, perpetration of dating abuse, and mental health. In addition to exploring this complex relationship, the present study examines whether psychological abuse perpetration mediates the relationship between acceptance of dating violence and mental health (i.e., internalizing symptoms of depression, anxiety, and hostility).

METHODS

Three waves of longitudinal data were obtained from 1,042 ethnically diverse high school students in Texas. Participants completed assessments of psychological dating abuse perpetration, acceptance of dating violence, and internalizing symptoms (hostility and symptoms of anxiety and depression).

RESULTS

As predicted, results indicated that perpetration of psychological abuse was significantly associated with acceptance of dating violence and all internalizing symptoms. Furthermore, psychological abuse mediated the relationship between acceptance of dating violence and internalizing symptoms.

CONCLUSIONS

Findings from the present study suggest that acceptance of dating violence is an important target for the prevention of dating violence and related emotional distress.

Domestic Violence Perpetrator Programs: A Proposal for Evidence-Based Standards in the United States

In the United States, the judicial system response to violence between intimate partners, or intimate partner violence (IPV), typically mandates that adjudicated perpetrators complete a batterer intervention program (BIP). The social science data has found that these programs, on the whole, are only minimally effective in reducing rates of IPV. The authors examined the social science literature on the characteristics and efficacy of BIPs. More than 400 studies were considered, including a sweeping, recently conducted survey of BIP directors across the United States and Canada. Results of this review indicate that the limitations of BIPs are due, in large part, to the limitations of current state standards regulating these programs and, furthermore, that these standards are not grounded in the body of empirical research evidence or best practices. The authors, all of whom have considerable expertise in the area of domestic violence perpetrator treatment, conducted an exhaustive investigation of the following key intervention areas: overall effectiveness of BIPs; length of treatment/length of group sessions; number of group participants and number of facilitators; group format and curriculum; assessment protocol and instruments; victim contact; modality of treatment; differential treatment; working with female perpetrators; working with perpetrators in racial and ethnic minority groups; working with lesbian, gay, bisexual, and transgender (LGBT) perpetrators; perpetrator treatment and practitioner–client relationships; and required practitioner education and training. Recommendations for evidence-based national BIP standards were made based on findings from this review.

Anger, problematic alcohol use, and intimate partner violence victimisation and perpetration

BACKGROUND

Anger and problematic alcohol use have been established as individual risk factors for intimate partner violence (IPV) victimisation and perpetration, but it is unknown how these factors convey risk for IPV perpetration for men and women within the context of mutually violent relationships.

HYPOTHESES

Anger and problematic alcohol use were hypothesised to mediate the association between IPV victimisation and perpetration for men and women, with direct and indirect influences from partner variables.

METHODS

Heterosexual couples (N = 215) at high-risk for IPV completed questionnaires indexing trait anger, problematic alcohol use and extent of past-year IPV perpetration and victimisation. An actor-partner interdependence modelling (APIM) framework was used to evaluate these cross-sectional data for two hypothesised models and one parsimonious alternative.

RESULTS

The best-fitting model indicated that IPV victimisation showed the strongest direct effect on physical IPV perpetration for both men and women. For women, but not men, the indirect effect of IPV victimisation on physical IPV perpetration through anger approached significance. For men, but not women, the victimisation-perpetration indirect effect through problematic drinking approached significance.

IMPLICATIONS FOR CLINICAL PRACTICE

The results suggest that anger and problem drinking patterns play different yet important roles for men and women in mutually violent relationships.

Longitudinal measures of hostility in deployed military personnel

Increases in anger and hostility are commonly found after military deployment. However, it is unknown how anger and hostility develop over time, and which veterans are more at risk for developing these complaints. Data of 745 veterans one month before deployment to Afghanistan and one, six, twelve and 24 months after deployment were analyzed in a growth model. Growth mixture modeling revealed four classes based on their growth in hostility. Most of the participants belonged to a low-hostile group or a mild-hostile group that remained stable over time. Two smaller groups were identified that displayed increase in hostility ratings after deployment. The first showed an immediate increase after deployment. The second showed a delayed increase between twelve and 24 months after deployment. No groups were identified that displayed a decrease of hostility symptoms over time. Multinomial logistic regression was applied to predict group membership by age, education, early trauma, deployment stressors and personality factors. This study gains more insight into the course of hostility over time, and identifies risk factors for the progression of hostility.