Specificity of sibship determination using the ABI Identifiler multiplex system

Fifty known siblings and fifty unrelated pairs were genotyped using the ABI Identifiler STR system and sibship indices computed for each pair. Combined sibship indices (CSIs) for the known siblings ranged from less than 10 to greater than 1 billion. CSIs for the unrelated pairs ranged from 4.5 x 10(-8) to 0.12. In the known sibling group the percentage of loci where both alleles matched was approximately 40%, while the percentage of loci where neither matched was approximately 10%. In the non-sibling group, the percentage of loci where both alleles matched was approximately 6%, while the percentage of loci where neither matched was approximately 45%. Interestingly, the percentage of loci where a single allele matched was the same in both the known siblings and unrelated pairs, approximately 50%.     

Attachment,Coping, and Explanatory Style in Late Adolescence

Using self-report data from 157 college students, we tested hypotheses regarding the relative importance of perceived security in early parental relationships vs. security in adult (nonparental) relationships for understanding respondents' coping dispositions and explanatory styles. In general, more secure attachments were positively related to support-seeking and active problem-solving coping styles and to females' but not males' tendency to explain hypothetical successes and failures in a positive or self-enhancing manner. Security of adult (nonparental) attachments had stronger associations with young women's coping strategies than did security of early attachment to parents, whereas the reverse was true for males—a finding we interpret in terms of girls' earlier development of emotional autonomy from parents and closer ties to friends. Security of early attachment to father appeared to have important implications for young men's willingness to turn to others for support.     

The Impact of Television,Electronic Games,and Social Technology Use on Sleep and Health in Adolescents with an Evening Circadian Preference

Journal of Youth and Adolescence - There are mixed findings when examining if technology use is harmful for adolescent sleep and health. This study builds on these mixed findings by examining the...     

The Base Rate Study: Developing Base Rates for Risk Factors and Indicators for Engagement in Violent Extremism

Improvements have been made in identifying the prevalence of risk factors/indicators for violent extremism. A consistent problem is the lack of base rates. How to develop base rates is of equal concern. This study has two aims: (i) compare two methods for developing base rates; the Unmatched Count Technique (UCT) and direct questioning, (ii) generate base rates in a general population sample and compare these to a sample of lone-actor terrorists (n = 125). We surveyed 2108 subjects from the general population. Participants were recruited from an online access panel and randomly assigned to one of three conditions; direct survey, control, or UCT. Survey items were based on a lone-actor terrorist codebook developed from the wider literature. Direct questioning was more suitable under our study conditions where UCT resulted in deflation effects. Comparing the base rates identified a number of significant differences: (i) lone-actor terrorists demonstrated propensity indicators related to a cognitive susceptibility, and a crime- and/or violence-supportive morality more often; the general sample demonstrated protective factors more often, (ii) lone-actor terrorists demonstrated situational indicators related to a crime- and/or violence-supportive morality more often, whereas the general sample experienced situational stressors more often, (iii) lone-actor terrorists demonstrated indicators related to exposure to extremism more often. Results suggest there are measurable differences in the prevalence of risk factors between lone-actor terrorists and the general population. However, no single factor “predicts” violent extremism. This bears implications for our understanding of the interrelation of risk and protective factors, and for the risk assessment of violent extremism.     

Suicidal Ideation Among Women Court-Referred to Batterer Intervention Programs

Identifying the prevalence and correlates of suicidal ideation in women mandated to batterer intervention programs is necessary to prevent suicide in this greatly understudied population. This study used cross-sectional, self-report survey methodology to identify the prevalence and correlates of suicidal ideation among 79 women attending batterer intervention programs. Of the sample, 33% reported experiencing suicidal ideation during the two weeks prior to entering the program. Multiple linear regression analysis indicated that (while controlling for number of batterer intervention sessions attended) symptoms of depression and borderline personality disorder, but not symptoms of antisocial personality disorder, were associated with suicidal ideation.     

Trajectories of Positive and Negative Behaviors from Early- to Middle-Adolescence

Although the positive youth development (PYD) model initially assumed inverse links between indicators of PYD and of risk/problem behaviors, empirical work in adolescence has suggested that more complex associations exist between trajectories of the two domains of functioning. To clarify the PYD model, this study assessed intraindividual change in positive and problematic indicators across Grades 5–10, and the links between these trajectories of development, among 2,516 participants from the 4-H Study of PYD (58.1% females; 64.9% European American, 7.0% African American, 12.3% Latino/a American, 2.6% Asian American or Pacific Islander, 1.8% Native American, 3.0% multiethnic-racial, and 8.4% with inconsistent race/ethnicity across waves). Results from person-centered analyses indicated that most youth clustered in the high trajectories of positive indicators and in the low trajectories of the negative ones. Consistent with past research, overlap between trajectories of positive and negative behaviors was found. These results suggest that theory and application need to accommodate to variation in the links between positive and problematic developmental trajectories.     

Not Whether,But When? Governments’ Use of Militias in War

Abstract

Although government use of militias during civil conflict can ultimately undermine state authority, governments still use militias for battlefield assistance. This paper examines the selectivity of government decisions to use militias by disaggregating civil conflict to the level of battle phases. Civil-conflict battles typically consist of four phases: preparation, clear, hold, and build. I argue that governments decide to use militias based on the strength of government security forces, operational advantages of militias, and the type of battle phase. Governments will limit the use of militias during key battle phases that are likely to receive increased media attention unless a victory secured by government security forces is unlikely or militias hold an operational advantage. A comparative analysis of the offensive operations in Tikrit and Ramadi during Iraq’s war against the Islamic State of Iraq and Syria (ISIS) lends initial support to this theory.