Information Technology, Social Networking, and Controlling Behaviors Among Adolescent Girls Involved in Dating Violence

Hypothesis: Girls with dating violence (DV) histories will report high levels of involvement in social networking and information technology (SNIT) as well as frequent engagement in controlling behaviors via SNIT

Host Responses in Life-History Traits and Tolerance to Virus Infection in Arabidopsis thaliana

Knowing how hosts respond to parasite infection is paramount in understanding the effects of parasites on host populations and hence host–parasite co-evolution. Modification of life-history traits in response to parasitism has received less attention than other defence strategies. Life-history theory predicts that parasitised hosts will increase reproductive effort and accelerate reproduction. However, empirical analyses of these predictions are few and mostly limited to animal-parasite systems. We have analysed life-history trait responses in 18 accessions of Arabidopsis thaliana infected at two different developmental stages with three strains of Cucumber mosaic virus (CMV). Accessions were divided into two groups according to allometric relationships; these groups differed also in their tolerance to CMV infection. Life-history trait modification upon virus infection depended on the host genotype and the stage at infection. While all accessions delayed flowering, only the more tolerant allometric group modified resource allocation to increase the production of reproductive structures and progeny, and reduced the length of reproductive period. Our results are in agreement with modifications of life-history traits reported for parasitised animals and with predictions from life-history theory. Thus, we provide empirical support for the general validity of theoretical predictions. In addition, this experimental approach allowed us to quantitatively estimate the genetic determinism of life-history trait plasticity and to evaluate the role of life-history trait modification in defence against parasites, two largely unexplored issues

Genomic Relationships, Novel Loci, and Pleiotropic Mechanisms across Eight Psychiatric Disorders

Genetic influences on psychiatric disorders transcend diagnostic boundaries, suggesting substantial pleiotropy of contributing loci. However, the nature and mechanisms of these pleiotropic effects remain unclear. We performed analyses of 232,964 cases and 494,162 controls from genome-wide studies of anorexia nervosa, attention-deficit/hyper-activity disorder, autism spectrum disorder, bipolar disorder, major depression, obsessive-compulsive disorder, schizophrenia, and Tourette syndrome. Genetic correlation analyses revealed a meaningful structure within the eight disorders, identifying three groups of inter-related disorders. Meta-analysis across these eight disorders detected 109 loci associated with at least two psychiatric disorders, including 23 loci with pleiotropic effects on four or more disorders and 11 loci with antagonistic effects on multiple disorders. The pleiotropic loci are located within genes that show heightened expression in the brain throughout the lifespan, beginning prenatally in the second trimester, and play prominent roles in neurodevelopmental processes. These findings have important implications for psychiatric nosology, drug development, and risk prediction.Peer reviewe

Information Technology, Social Networking, and Controlling Behaviors

Hypothesis: Girls with dating violence (DV) histories will report high levels of involvement in social networking and information technology (SNIT) as well as frequent engagement in controlling behaviors via SNIT

Middle School Predictors of High School Dating Violence Among At-Risk Early Adolescents

Hypothesis: Emotion regulation (ER) skills (higher ER, lower emotional lability/negativity) and greater parental communication in 8th grade will be associated with less frequent dating violence (DV) involvement in 9th grade for at-risk early adolescents

Individual and Relationship Characteristics of Adolescent Girls with Histories of Physical Dating Violence

The objective of this article is to examine the individual and relational characteristics of adolescent girls with a history of physical DV, as well as to utilize partner-specific, temporal data to explore links between these factors and recent or ongoing DV experiences. Participants were 109 high school girls (ages 14-17) identified as having a history of DV through a school-based screening procedure. Details regarding the timing of DV and links with specific dating partners were gathered using Timeline Followback (TLFB) interview methodology. At study entry, 30% endorsed clinical levels of depression symptoms and 89% reported delinquent behaviors. Forty-four percent reported vaginal intercourse in their lifetime and of those, 35% reported not using a condom at last sex. During the 90 days prior to study entry, 69% of youth reported having a romantic relationship and 58% of those youth reported physical/sexual violence. Data revealed that more physical/sexual violence was associated with longer relationship length, Wald χ2(2) = 1,142.63, p \u3c .001. Furthermore, depressive symptoms, not delinquency, contributed significantly to recent DV experiences, even when relationship length was controlled. Our findings suggest that prevention programs for this population should teach participants how to quickly recognize unhealthy relationship characteristics, as violence severity increases with relationship length. Programs for adolescent girls should also address depressive symptoms, which are linked to DV severity when other risks are taken into account. Finally, the TLFB calendar method appears useful for gathering the temporal and partner-specific data needed to understand the complexity of dating relationships and violence experiences in this population

Gender Differences in Recidivism Rates for Juvenile Justice Youth: The Impact of Sexual Abuse

Young female offenders represent a growing number of young offenders. Studies have shown that youth in the juvenile justice system, particularly young females, report higher rates of lifetime sexual abuse than their nonoffending peers. The aim of this study was to examine gender differences in risk factors for recidivism, including a history of sexual abuse, among a juvenile court clinic sample. Findings suggest that, even after accounting for previously identified risk factors for recidivism such as prior legal involvement and conduct problems, a history of sexual abuse is the most salient predictor of recidivism for young female offenders, but not for males. The development of gender-responsive interventions to reduce juvenile recidivism and continued legal involvement into adulthood may be warranted

Gender differences in recidivism rates for juvenile justice youth: The impact of sexual abuse.

Young female offenders represent a growing number of young offenders. Studies have shown that youth in the juvenile justice system, particularly young females, report higher rates of lifetime sexual abuse than their nonoffending peers. The aim of this study was to examine gender differences in risk factors for recidivism, including a history of sexual abuse, among a juvenile court clinic sample. Findings suggest that, even after accounting for previously identified risk factors for recidivism such as prior legal involvement and conduct problems, a history of sexual abuse is the most salient predictor of recidivism for young female offenders, but not for males. The development of gender-responsive interventions to reduce juvenile recidivism and continued legal involvement into adulthood may be warranted

The Association Between Exposure to Violent Pornography and Teen Dating Violence in Grade 10 High School Students

Exposure to pornography in general has been linked with adolescent dating violence and sexual aggression, but less is known about exposure to violent pornography specifically. The current study examined the association of violent pornography exposure with different forms of teen dating violence (TDV) using baseline survey data from a sample of Grade 10 high school students who reported being in a dating relationship in the past year (n = 1694). Gender-stratified logistic regression models generated odds ratios adjusted for demographics, substance use, history of suspension/expulsion, gender equitable attitudes, and tolerance of rape myths to identify significant associations between violent pornography exposure and self-reported physical, sexual, and threatening TDV perpetration and victimization. Violent pornography exposure was associated with all types of TDV, though patterns differed by gender. Boys exposed to violent pornography were 2–3 times more likely to report sexual TDV perpetration and victimization and physical TDV victimization, while girls exposed to violent pornography were over 1.5 times more likely to be perpetrate threatening TDV compared to their non-exposed counterparts. Comprehensive prevention strategies for TDV may consider the potential risks associated with exposure to violent pornography, particularly for boys, and provide an alternative source of education about healthy sexual behavior and relationships