Perpetration of sibling aggression and sibling relationship quality in emerging adulthood

This study examined how emerging adults' perpetration of aggression toward a sibling closest in age was longitudinally associated with their sibling relationship quality. Emerging adults (N = 143; M_age = 19.62; 70% female) completed surveys online or by mail at two time points, 4 years apart. Of emerging adults, 25% perpetrated aggression against their closest‐in‐age sibling. Perpetration of sibling aggression was predictive 4 years later of less sibling warmth, involvement, and emotional help. None of the interactions with gender and sibling gender was significant. This study's findings demonstrate the importance of examining the consequences of perpetration of aggressive behavior toward a sibling for sibling relationship quality in emerging adulthood.     

Psychosocial mediators of antiretroviral nonadherence in HIV-positive adults with substance use and mental health problems.

This study used data from 1,889 HIV-positive patients on antiretroviral (ARV) medications who participated in the HIV Cost and Services Utilization Study to investigate whether nonadherence to ARV medications among patients with mental health and substance use problems could be explained by difficulty getting and negative attitudes toward ARV medications, poor fit of the regimen with lifestyle, lack of instruction and cues for remembering the regimen from a health care provider, and poor support from others for taking ARV medications. Difficulty getting ARV medications and poor fit with lifestyle were significant mediators of nonadherence for patients with a probable psychiatric disorder. Difficulty getting medication was a mediator for heavy drinkers, and poor fit with lifestyle was a mediator for drug users who drank heavily. Further research is needed to identify and address the barriers to adherence in these populations.     

Effects of homophobic name‐calling and verbal sexual harassment on substance use among young adults

Verbal aggression victimization, such as homophobic name‐calling, has been linked to heavier substance use among young people, but little longitudinal research has examined how different types of victimization may affect substance use or whether certain psychosocial factors moderate these risks. In a diverse cohort (N = 2,663), latent transition analysis was used to model heterogeneity in victimization (age 19) and substance use (age 20). Four victimization (high victimization, homophobic name‐calling only, verbal sexual harassment only, and low victimization) and three substance use (poly‐substance use, alcohol, and cannabis only, low all) classes were identified. The high victimization and homophobic name‐calling only classes had the highest probabilities of transitioning into the poly‐substance use class, and the high victimization class had the highest probability of transitioning into the alcohol and cannabis only class. The probability of transitioning into the low all substance use class was highest in the low victimization class and lowest in the high victimization class. For the high victimization class, greater depressive symptoms increased the odds, and better peer relationship quality decreased the odds, of transitioning into the poly‐substance use and alcohol and cannabis only classes. For the homophobic name‐calling only class, greater depressive symptoms increased the odds of transitioning into the poly‐substance use class. Homophobic name‐calling, alone or in combination with verbal sexual harassment, is a risk factor for escalating substance use in young adulthood, especially among victims with depressive symptoms.     

Liberal and Conservative Values: What We Can Learn From Congressional Tweets

Past research using self‐report questionnaires administered to ordinary citizens demonstrates that value priorities differ as a function of one's political ideology, but it is unclear whether this conclusion applies to political elites, who are presumably seeking to appeal to very broad constituencies. We used quantitative methods of textual analysis to investigate value‐laden language in a collection of 577,555 messages sent from the public Twitter accounts of over 400 members of the U.S. Congress between 2012 and 2014. Consistent with theoretical expectations, we observed that Republican and conservative legislators stressed values of tradition, conformity, and national security (as well as self‐direction), whereas Democratic and liberal legislators stressed values of benevolence, universalism, hedonism, and social/economic security (as well as achievement). Implications for the large‐scale observational study of political psychology are explored.     

The effect of passive heat stress on distress andself-control in male smokers and non-smokers

In the current study, we tested the effects of core body temperature increases (e.g. heat stress) on affect, self-reported physical discomfort, and subsequent self-control in male smokers and nonsmokers using a novel passive heat stress paradigm, within a distress tolerance framework. Twenty-eight men (14 smokers), completed both heat stress and control sessions in randomized order. Results revealed that increases in core body temperature were associated with increased anxiety, irritability, and body discomfort as well as decreased happiness, with stronger effects for smokers. Smokers and nonsmokers both evidenced less self-control during the heat session and did not differ on this measure, nor on a measure of interoceptive sensitivity. The current study indicates that heat stress is a viable method for studying distress tolerance in men, and suggests the value in examining dynamic changes in self-control as a function of distress. Implications will be discussed for distress tolerance in general and smokers in specific.     

The moderating effect of humor style on the relationship between interpersonal predictors of suicide and suicidal ideation

This study investigated how positive and negative humor styles relate to suicidal ideation, thwarted belongingness, and perceived burdensomeness. Analyses indicated that affiliative and self-defeating humor style moderated the relationships between thwarted belongingness and suicidal ideation as well as perceived burdensomeness and suicidal ideation when controlling for depression. The clinical importance of assessing and tracking humor styles as potential coping mechanisms against suicidal thinking is discussed.     

A matrix multiplier

A machine to expedite matrix multiplication has been developed by modifying the International Business Machines Corporation scoring machine. The principles and operation of the machine are described, and time and accuracy estimates are indicated.