SARS-CoV-2 control on a large urban college campus without mass testing.

Objective: A small percentage of universities and colleges conducted mass SARS-CoV-2 testing. However, universal testing is resource-intensive, strains national testing capacity, and false negative tests can encourage unsafe behaviors.

Participants: A large urban university campus.

ENSO Drives interannual variation of forest woody growth across the tropics.

Meteorological extreme events such as El Niño events are expected to affect tropical forest net primary production (NPP) and woody growth, but there has been no large-scale empirical validation of this expectation. We collected a large high-temporal resolution dataset (for 1-13 years depending upon location) of more than 172 000 stem growth measurements using dendrometer bands from across 14 regions spanning Amazonia, Africa and Borneo in order to test how much month-to-month variation in stand-level woody growth of adult tree stems (NPP) can be explained by seasonal variation and interannual meteorological anomalies. A key finding is that woody growth responds differently to meteorological variation between tropical forests with a dry season (where monthly rainfall is less than 100 mm), and aseasonal wet forests lacking a consistent dry season.

Elevated Risky Sexual Behaviors Among Sexual Minority Girls: Indirect Risk Pathways Through Peer Victimization and Heavy Drinking.

Sexual minority girls (SMGs), compared with heterosexual females, are more likely to report negative sexual outcomes including earlier age of sexual intercourse debut, more lifetime and recent sexual partners, pregnancy involvement, and sex while intoxicated. Data describing the mechanisms related to these health disparities are limited. The purpose of this study was therefore to longitudinally assess the roles of sexual minority-related peer victimization and heavy episodic drinking (HED) as mediators of the relation between sexual minority status and sexual outcomes.

Risk of heavy drinking among sexual minority adolescents: indirect pathways through sexual orientation-related victimization and affiliation with substance-using peers.

Aims: To test two indirect pathways through which sexual minority adolescents (SMAs) may be at risk for heavy episodic drinking (HED) including a socialization pathway via substance-using peer affiliations and social marginalization pathway via sexual minority-specific victimization and subsequent substance-using peer affiliations.

Design: Analysis of the first three waves (6 months apart) of a longitudinal adolescent health risk study (2011-14). Participants were referred by medical providers or a screening system in providers' waiting rooms.

School absenteeism and mental health among sexual minority youth and heterosexual youth.

Adolescent school absenteeism is associated with negative outcomes such as conduct disorders, substance abuse, and dropping out of school. Mental health factors, such as depression and anxiety, have been found to be associated with increased absenteeism from school. Sexual minority youth (youth who are attracted to the same sex or endorse a gay, lesbian, or bisexual identity) are a group at risk for increased absenteeism due to fear, avoidance, and higher rates of depression and anxiety than their heterosexual peers.

Social problem solving among depressed adolescents is enhanced by structured psychotherapies.

Objective: Changes in adolescent interpersonal behavior before and after an acute course of psychotherapy were investigated as outcomes and mediators of remission status in a previously described treatment study of depressed adolescents. Maternal depressive symptoms were examined as moderators of the association between psychotherapy condition and changes in adolescents' interpersonal behavior.

Method: Adolescents (n = 63, mean age = 15.

Mental health and substance use disparities among urban adolescent lesbian and bisexual girls.

Background: Sexual minority girls (SMGs) report large substance use disparities and victimization experiences, yet there is a dearth of research that focuses exclusively on SMGs.

Objective: To examine substance use and mental health disparities among SMGs and to determine whether disparities were larger for African American compared with European American girls.

Method: Data were used from Wave 11 of the Pittsburgh Girls Study, a multiple-cohort, prospective study of urban girls.

Cross-sectional evidence for a stress-negative affect pathway to substance use among sexual minority girls.

Sexual minority girls (SMGs) are four times more likely to engage in substance use than are heterosexual girls. A better understanding of the explanatory mechanisms of this disparity is needed to inform prevention and intervention programs. The goal of this study was to conduct a preliminary test of a "stress-negative affect" pathway by examining gay-related victimization and depression as mediators of substance use among SMGs.

Longitudinal disparities of hazardous drinking between sexual minority and heterosexual individuals from adolescence to young adulthood.

Sexual minority (lesbian and gay, bisexual, mostly heterosexual) individuals are at an increased risk for hazardous drinking than heterosexual individuals, but little is known about the nature of the disparities as adolescents reach adulthood. We used four waves of a nationally representative data set, the National Longitudinal Study of Adolescent Health (Add Health), to examine disparities of hazardous drinking outcomes between sexual minority and heterosexual men and women from adolescence to young adulthood. Participants were 14-18 years old at the first assessment (N = 12,379; 53 % female) and 27-31 years old at the fourth assessment.

Impulsivity moderates the relationship between implicit associations about alcohol and alcohol use.

Implicit associations about alcohol are strong predictors of alcohol use, as is the personality trait of impulsivity. This study examines the role of impulsivity as a moderator of the association between implicit associations about alcohol and alcohol use. Two hundred and 19 participants completed measures of positive and negative implicit associations, as measured by the Implicit Association Test (IAT) and self-report questionnaires of impulsivity and alcohol use in the past month.

Differences in implicit associations about alcohol between blacks and whites following alcohol administration.

Objective: Implicit cognitions about alcohol have been shown to be an important predictor of alcohol use. Relatively little research has been conducted on racial/ethnic differences in implicit cognitions or changes in implicit cognitions while intoxicated. This study examined differences between Blacks and Whites in positive and negative implicit associations about alcohol, as measured by the Implicit Association Test (IAT) and tested differences in IAT scores when participants were sober and intoxicated.

Positive affect, intuition, and feelings of meaning.

Subjective rationality, or the feeling of meaning, was identified by William James (1893) as a central aspect of the non-sensory fringe of consciousness. Three studies examined the interaction of positive affect (PA) and individual differences in intuitive information processing in predicting feelings of meaning for various stimuli and life events. In Study 1 (N = 352), PA and intuition interacted to predict understanding for ambiguous quotes and abstract artwork.

The health benefits of writing about positive experiences: the role of broadened cognition.

This study tested the potential to elicit a broadened attentional focus through writing about a positive life experience and to derive health benefits from such writing. Participants (n = 38) wrote for 20 min each day for 3 consecutive days about either a positive life experience or a control topic. Writing about positive experiences led to improved physical health (measured 4-6 weeks after writing) compared to control and higher levels of global cognitive focus after writing mediated this effect.

Effects of (very) brief writing on health: the two-minute miracle.

This study tested the lower boundary of the dosage required to garner health benefits from written emotional expression. Participants wrote about either a personal trauma, a positive life experience, or a control topic for 2 minutes each day for 2 days. Emotion word usage in the essays was examined and physical health complaints were measured 4-6 weeks after the last writing session.

Ghosts, UFOs, and magic: positive affect and the experiential system.

Three studies examined the potential interactions of the experiential system and positive affect (PA) in predicting superstitious beliefs and sympathetic magic. In Study 1, experientiality and induced positive mood interacted to predict the emergence of belief in videos purporting to show unidentified flying objects or ghosts. In Study 2, naturally occurring PA interacted with experientiality to predict susceptibility to sympathetic magic, specifically difficulty in throwing darts at a picture of a baby (demonstrating the law of similarity).