The present study was designed with the purpose of contributing to the existing scientific literature about the presence of Dark Tetrad personality traits--Machiavellianism, psychopathy, narcissism, and sadism--in aggressors and victims of school bullying, also taking into account the possible gender differences in both roles. The results,…

Indirect aggression has been associated with antisocial personality traits like Machiavellianism, but there is a lack of evidence on their longitudinal development across adolescence. Therefore, the joint developmental trajectories of adolescent indirect aggression and Machiavellianism across 3 years of high school (Grades 10 to 12) were…

Background: Adults with intellectual disabilities (ID) commonly live in specialised residential settings. Data collected from these adults are often nested. The aim of this study is to examine the impact of this data structure. Method: Referent caregivers completed the Reiss Screen for Maladaptive Behaviour for each of the 571 adults with ID who…

In this research, whether the undergraduates' attitude levels towards the dating violence differed in terms of gender, dating relationship status, being exposed to the dating violence and resorting to the dating violence was investigated. The sample of the study was composed of 1171 undergraduates. In the research, "The Attitudes toward…

This research examined whether following social and physical aggression trajectories across Grades 3-12 predicted psychological maladjustment. Teachers rated participants' (n = 287, 138 boys) aggressive behavior at the end of each school year. Following the 12th grade, psychosocial outcomes were measured: rule-breaking behaviors, internalizing…

Antisocial behavior and school aggression in youth has been linked with affective, interpersonal, self-attributional, and behavioral characteristics; these traits have often been associated with psychopathic behaviors among adults. Psychopathic traits were examined in nonclinically-referred youth exhibiting antisocial and aggressive behavior.…

This study had three primary goals: to explore the relationship between narcissism, participant roles, and aggression; to examine the role of gender as a moderating influence on narcissism-based aggression; and to examine how these variables work together to influence aggressive outcomes in a sample of aggressive middle and high school students.…

This longitudinal investigation assessed whether cognitive schemas of justification of violence, mistrust, and narcissism predicted social information processing (SIP), and SIP in turn predicted aggressive behavior in adolescents. A total of 650 adolescents completed measures of cognitive schemas at Time 1, SIP in ambiguous social scenarios at…

The authors examined the role of early adverse experiences, mental health problems, and disabilities in the prediction of juvenile delinquency and recidivism, using a matched-control group design. The delinquent group comprised 99,602 youth, born between 1981 and 1988, whose cases had been processed by the South Carolina Department of Juvenile…

Background: The link between aggression and mental disorders has been the focus of diverse studies in persons with and without intellectual disabilities (ID). Because of discrepancies in the finding of studies in persons with ID to date, and because of differences in research design, instruments used and the population studied, more research is…

Aim: To establish any differences between patients with and without a diagnosis of personality disorders, being treated in a secure inpatient service for offenders with intellectual disability (ID) in the UK. Method: A cohort study involving a selected population of people with ID and offending behaviours. Results: The study included a total of…

This study examined relationship aggression reporting concordance among 303 men with alcohol use disorders and their female partners enrolled in couples-based alcohol abuse treatment. Agreement for physical and psychological aggression was generally consistent with, or higher than, concordance rates reported among other populations. Men's…

Women arrested for intimate partner violence raise challenges for those working in domestic violence programs. Theoretically, there is no agreement about whether women are aggressive for the same reasons as men or merely victims fighting back in an abusive relationship. Practically, there is very little research to guide treatment of this…

This study evaluated the structural reliability, construct-related validity, and cultural validity generalization of the Hare Psychopathy Checklist: Screening Version (PCL:SV) in a sample of more than 560 male and female Swedish forensic psychiatric treatment patients, forensic evaluation patients, and criminal offenders. Structural reliability…

Background: This study aimed to identify personality features characterizing adolescent girls and boys with borderline personality disorder (BPD) and to see whether meaningful patterns of heterogeneity exist among adolescents diagnosed with the disorder. Methods: Two hundred and ninety-four randomly selected doctoral-level clinicians described…