Longitudinal Analysis of Particulate Air Pollutants and Adolescent Delinquent Behavior in Southern California

Animal experiments and cross-sectional human studies have linked particulate matter (PM) with increased behavioral problems. We conducted a longitudinal study to examine whether the trajectories of delinquent behavior are affected by PM_2.5 (PM with aerodynamic diameter?≤?2.5 μm) exposures before and during adolescence. We used the parent-reported Child Behavior Checklist at age 9–18 with repeated measures every ~2–3 years (up to 4 behavioral assessments) on 682 children from the Risk Factors for Antisocial Behavior Study conducted in a multi-ethnic cohort of twins born in 1990–1995. Based on prospectively-collected residential addresses and a spatiotemporal model of ambient air concentrations in Southern California, monthly PM_2.5 estimates were aggregated to represent long-term (1-, 2-, 3-year average) exposures preceding baseline and cumulative average exposure until the last assessment. Multilevel mixed-effects models were used to examine the association between PM_2.5 exposure and individual trajectories of delinquent behavior, adjusting for within-family/within-individual correlations and potential confounders. We also examined whether psychosocial factors modified this association. The results sμggest that PM_2.5 exposure at baseline and cumulative exposure during follow-up was significantly associated (p?<?0.05) with increased delinquent behavior. The estimated effect sizes (per interquartile increase of PM_2.5 by 3.12–5.18 μg/m³) were equivalent to the difference in delinquency scores between adolescents who are 3.5–4 years apart in age. The adverse effect was stronger in families with unfavorable parent-to-child relationships, increased parental stress or maternal depressive symptoms. Overall, these findings sμggest long-term PM_2.5 exposure may increase delinquent behavior of urban-dwelling adolescents, with the resulting neurotoxic effect aggravated by psychosocial adversities.     

Rational Inference of Beliefs and Desires From Emotional Expressions

We investigated people's ability to infer others’ mental states from their emotional reactions, manipulating whether agents wanted, expected, and caused an outcome. Participants recovered agents’ desires throughout. When the agent observed, but did not cause the outcome, participants’ ability to recover the agent's beliefs depended on the evidence they got (i.e., her reaction only to the actual outcome or to both the expected and actual outcomes; Experiments 1 and 2). When the agent caused the event, participants’ judgments also depended on the probability of the action (Experiments 3 and 4); when actions were improbable given the mental states, people failed to recover the agent's beliefs even when they saw her react to both the anticipated and actual outcomes. A Bayesian model captured human performance throughout (rs ≥ .95), consistent with the proposal that people rationally integrate information about others’ actions and emotional reactions to infer their unobservable mental states.     

Psychological distress and resilience as risk and protective factors of psychoactive substance use among Chinese nonengaged youth

Nonengaged youth (NEY) are those who have neither been working nor studying for a prolonged period of time. They are at risk of psychoactive substance use, but relevant studies are scarce. Based on a population‐based telephone survey and referrals, we anonymously interviewed 479 Hong Kong Chinese NEY aged 15–24 years. Of them, 14.8–23.7% reported moderate to severe depression, anxiety, and stress. Moreover, one fourth of the participants (24.8%; n = 119) had used psychoactive substances. Adjusted analyses showed that these three psychological distress variables were positively associated with, while resilience was negatively associated with, both ever‐use of psychoactive substances and intention to use such substances in the next 12 months. Loneliness was associated only with intention to use psychoactive substances. The mediating role of psychological distress was shown: Anxiety significantly mediated the association between resilience and ever‐use of psychoactive substances, whereas depression mediated that between resilience and behavioural intention. Resilience was not a significant moderator on the relationship between psychological distress and ever‐use of psychoactive substance use or behavioural intention to use those substances. The findings suggest that anti‐drug interventions should outreach NEY and should include mental health support as well as building up resilience, as NEY are prone to psychological distress that increases risk of substance use.     

Maternal Emotion Socialization and Child Outcomes among African Americans and European Americans

Mothers’ emotion socialization practices are very important for children’s later outcomes; however, we know very little about how these practices may lead to different outcomes for European American (EA) and African American (AA) children. In the current study, maternal emotion socialization practices were investigated in relation to child emotion-related outcomes in 122 pairs of mothers and preschool-age children, and differences in associations were examined for EA and AA families. Mothers were assessed for their expressions of positive emotion with their child and their responses to their child’s negative emotions, including support of sadness/fear and magnification of anger, when children were 3. Children were assessed for their expression of positive emotion with their mother and their internalizing and externalizing problem behaviors when they were 4. When ethnicity was included as a moderator, results revealed that when AA mothers expressed more positive emotion, their children were also more positive 1 year later. Additionally, as AA mothers provided greater support for their children’s sadness/fear, these children tended to have fewer later internalizing problems. Finally, when AA mothers responded with more magnification of their children’s anger, these children tended to have greater internalizing and externalizing problems 1 year later. These associations were not found for EA families. Results highlighted differential effects based on the type of support provided by mothers and the role that mothers played in encouraging or suppressing their child’s expressions. The overall findings highlight the need to consider maternal emotion socialization from a culturally-informed perspective.     

Self-esteem and hope mediate the relations between social support and post-traumatic stress disorder and growth in adolescents following the Ya’an earthquake

Background and objective: Although posttraumatic stress disorders (PTSD) and posttraumatic growth (PTG) can co-exist, and several theories suggest that social support, self-esteem, and hope can predict both PTSD and PTG, no study to date has examined the combined role of social support, self-esteem, and hope in PTSD and PTG. The present study aimed to simultaneously examine the mediating roles of self-esteem and hope in the relations between social support and PTSD, and between social support and PTG.

Design: This study included 397 adolescents living in Lushan County, China, who were affected by the Ya’an earthquake.

Method: The participants completed the self-report questionnaires at two and a half years after the earthquake. Structural equation models were built to examine the roles of social support, self-esteem, and hope in PTSD and PTG.

Results: Social support directly and negatively predicted PTSD and positively predicted PTG. Moreover, social support negatively predicted PTSD via self-esteem, and positively predicted PTG via hope. In addition, social support positively predicted PTG through multiple mediating paths from self-esteem to hope.

Conclusions: PTSD and PTG had different predictive paths. Specifically, social support reduced PTSD through enhanced self-esteem and promoted PTG through hope, or through the path from self-esteem to hope.     

The effects of four days of intensive mindfulness meditation training (Templestay program) on resilience to stress: a randomized controlled trial

The interest in mindfulness meditation interventions has surged due to their beneficial effects in fostering resilience and reducing stress in both clinical and non-clinical populations. However, the relaxation benefits that may occur while practicing mindfulness meditation and long-term benefits of these interventions remain unclear. Fifty-one participants were recruited and randomized into the experimental and control groups, which underwent 4 days of Intensive Meditation (Templestay program, n = 33) and Relaxation (Control, n = 18), respectively. The self-report measures of Cognitive and Affective Mindfulness Scale-Revised (CAMS) and the modified Korean version of the Resilience Quotient Test (RQT) were administered pre-, post- and 3 months after the intervention to measure participants’ levels of mindfulness and resilience. Participants in both the Templestay program and Control groups showed significant increases in their scores on CAMS and RQT after completing the program. During the 3-month follow-up, a significant interaction effect of the intervention method and time was revealed for the individuals’ CAMS and RQT scores. Our findings support the hypothesis that while relaxation practices may have certain stress reduction effects, the effects are predominantly mediated by the mindfulness meditation practice. Furthermore, the long-term benefits of increased resilience observed in the Templestay program group suggest that the practice may be a possible treatment strategy in clinical populations, such as patients with depression and anxiety.     

Using Video Self-Modeling as a Small Group Reading Fluency Intervention for Elementary School Students

Video self-modeling (VSM) has been used widely in the literature to teach a range of prosocial behaviors. More recently, VSM has been explored as both a supplement and stand-alone option to teach academic skills, particularly oral reading fluency. However, the literature is relatively sparse pertaining to the effects of video modeling, void of any current literature exploring the effects of video modeling as a component to small group reading interventions. The present study implemented a multiple baseline design across participants, with an alternating treatment design directly comparing a small group reading intervention with and without VSM. Nonoverlap of all pairs was used to measure the effects of the small group intervention with and without VSM relative to baseline, as well as to compare the two intervention packages to one another. Nonoverlap of all pairs scores indicated moderate to strong effects for both interventions across all participants, with little difference between the two interventions.     

The game is afoot: A response to three insightful commentaries

This is an author response to commentaries on our original article (Wu, Sheppard & Mitchell, 2016). We abstract two main themes from the commentaries, and they are as follows: (1) What kind of clues in target behaviour allow perceivers to infer target EQ? And related with this, by what process do perceivers infer the target's EQ? (2) Do features of the target group naturally lead to a U‐shaped function, whereby it is easy for perceivers to identify those at the extremes but not those in the middle of the continuum?