Component analysis of simple span vs. complex span adaptive working memory exercises: A randomized,controlled trial

There has been growing interest in using adaptive training interventions such as Cogmed-RM to increase the capacity of working memory (WM), but this intervention may not be optimally designed. For instance, Cogmed-RM can target the primary memory (PM) component of WM capacity, but not the secondary memory (SM) component. The present study hypothesized that Cogmed-RM does not target SM capacity because the simple span exercises it uses may not cause a sufficient amount of information to be lost from PM during training. To investigate, we randomly assigned participants to either a standard (simple span; N = 31) or a modified (complex span; N = 30) training condition. The main findings showed that SM capacity did not improve, even in the modified training condition. Hence, the potency of span-based WM interventions cannot be increased simply by converting simple span exercises into complex span exercises.     

Young Adult Women’s Reports of Their Male Romantic Partner’s Pornography Use as a Correlate of Their Self-Esteem, Relationship Quality, and Sexual Satisfaction

Pornography is both prevalent and normative in many cultures across the world, including United States’ culture; however, little is known about the psychological and relational effects that it can have on young adult women involved in heterosexual romantic relationships in which their male partners view pornography. The purpose of this study was to examine the relationships between men’s pornography use, both frequency and problematic use, on their heterosexual female partner’s psychological and relational well-being among 308 young adult college women. In addition, psychometric properties for the Perceived Partner’s Pornography Use Scale are provided. Participants were recruited at a large Southern public university in the United States and completed an online survey. Results revealed women’s reports of their male partner’s frequency of pornography use were negatively associated with their relationship quality. More perceptions of problematic use of pornography was negatively correlated with self-esteem, relationship quality, and sexual satisfaction. In addition, self-esteem partially mediated the relationship between perceptions of partner’s problematic pornography use and relationship quality. Finally, results revealed that relationship length moderated the relationship between perceptions of partner’s problematic pornography use and sexual satisfaction, with significant dissatisfaction being associated with longer relationship length.     

Mediation analysis and categorical variables: The final frontier

Many scholars are interested in understanding the process by which an independent variable affects a dependent variable, perhaps in part directly and perhaps in part indirectly, occurring through the activation of a mediator. Researchers are facile at testing for mediation when all the variables are continuous, but a definitive answer had been lacking heretofore as to how to analyze the data when the mediator or dependent variable is categorical. This paper describes the problems that arise as well as the potential solutions. In the end, a solution is recommended that is both optimal in its statistical qualities as well as practical and easily implemented: compute z_Mediation.     

Mediation with categorical variables compleat

This rejoinder addresses the thoughtful issues raised by the commentators. We hold to the analytical solution of fitting X → M (to obtain a and sa) and X&;M→ (to obtain b and sb) via regression or logistic regression, depending on whether M and Y are continuous or categorical. Then researchers compute za, zb, and ZMediation.     

DO COPING STYLES MODERATE OR MEDIATE THE RELATIONSHIP BETWEEN INTERNALIZED HETEROSEXISM AND SEXUAL MINORITY WOMEN'S PSYCHOLOGICAL DISTRESS?

The purpose of this study was to test tenets of both minority stress and lesbian feminist/sexual identity development theories by examining the potential moderating and mediating roles of individual coping styles (i.e., problem-solving and avoidant coping) in the relationship between internalized heterosexism and lesbian and bisexual (sexual minority) women's psychological distress. Participants included 323 sexual minority women who completed an Internet survey. Results revealed that avoidant coping partially mediated the relationship between internalized heterosexism and psychological distress. No support was found for the mediating role of problem-solving coping or for the moderating roles of problem-solving and avoidant coping in the link between internalized heterosexism and psychological distress. Feminist strategies that may be useful for clinicians working with clients to reduce internalized heterosexism are provided.     

Stable same‐sex friendships with higher achieving partners promote mathematical reasoning in lower achieving primary school children

This study was designed to investigate friend influence over mathematical reasoning in a sample of 374 children in 187 same‐sex friend dyads (184 girls in 92 friendships; 190 boys in 95 friendships). Participants completed surveys that measured mathematical reasoning in the 3rd grade (approximately 9 years old) and 1 year later in the 4th grade (approximately 10 years old). Analyses designed for dyadic data (i.e., longitudinal actor‐partner interdependence model) indicated that higher achieving friends influenced the mathematical reasoning of lower achieving friends, but not the reverse. Specifically, greater initial levels of mathematical reasoning among higher achieving partners in the 3rd grade predicted greater increases in mathematical reasoning from 3rd grade to 4th grade among lower achieving partners. These effects held after controlling for peer acceptance and rejection, task avoidance, interest in mathematics, maternal support for homework, parental education, length of the friendship, and friendship group norms on mathematical reasoning.