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"This accessible volume presents both the mechanics of structural equation modeling (SEM) and specific SEM strategies and applications. The editor, along with an international group of contributors, and editorial advisory board are leading methodologists who have organized the book to move from simpler material to more statistically complex modeling approaches. Sections cover the foundations of SEM; statistical underpinnings, from assumptions to model modifications; steps in implementation, from data preparation through writing the SEM report; and basic and advanced applications, including new and emerging topics in SEM. Each chapter provides conceptually oriented descriptions, fully explicated analyses, and engaging examples that reveal modeling possibilities for use with readers' data. Many of the chapters also include access to data and syntax files at the companion website, allowing readers to try their hands at reproducing the authors' results"--

How do individual differences interact with situational factors to shape social behavior? Are people with certain traits more likely to form lasting marriages; experience test-taking anxiety; break the law; feel optimistic about the future? This handbook provides a comprehensive, authoritative examination of the full range of personality variables associated with interpersonal judgment, behavior, and emotion. The contributors are acknowledged experts who have conducted influential research on the constructs they address. Chapters discuss how each personality attribute is conceptualized and ass

Researchers who investigate group phenomena can choose either the group as a whole or individuals within groups as a basis for formulating research questions, developing datagathering strategies, and conducting statistical analyses. This article considers the virtues and limitations of using individual-level data to investigate group phenomena and describes three categories of research questions about individuals in groups: (a) the contribution of group members to the composition of the group, (b) individuals'experience of belonging to the group, and (c) the impact of group membership on group members' personal life. The authors describe two examples from research on cohesion that addresses questions about individuals 'experience of belonging to groups and the impact of group membership on their personal life. We conclude by noting the limitations of the approach we advocate and mapping directions for future research suggested by our emphasis on individual-level analysis of small-group phenomena.

In a community sample of emerging adults ( N = 232), this study (a) assessed participants' exposure to and postings about alcohol, cigarettes, e-cigarettes, and marijuana across social media platforms, (b) investigated how exposure to and posting about text versus visual substance-related content differentially relate to one's own use, and (c) tested if exposure to versus posting about substances differentially relate to use. Data were collected via cross-sectional, daily, and observational methods. Participants were frequently exposed to substances on social media. Postings were less common, with Snapchat a notable outlet. Visual posts were somewhat more prominently linked to one's own use than text posts. Posting about substances tended to be more strongly associated with own use than exposure, but this did not necessarily replicate with observed assessments. Social media platforms are key for emerging adults to encounter and post about substance use content, with implications for emerging adults' own substance use.

In the study reported here, we examined posttraumatic stress disorder (PTSD) symptoms in 746 Danish soldiers measured on five occasions before, during, and after deployment to Afghanistan. Using latent class growth analysis, we identified six trajectories of change in PTSD symptoms. Two resilient trajectories had low levels across all five times, and a new-onset trajectory started low and showed a marked increase of PTSD symptoms. Three temporary-benefit trajectories, not previously described in the literature, showed decreases in PTSD symptoms during (or immediately after) deployment, followed by increases after return from deployment. Predeployment emotional problems and predeployment traumas, especially childhood adversities, were predictors for inclusion in the nonresilient trajectories, whereas deployment-related stress was not. These findings challenge standard views of PTSD in two ways. First, they show that factors other than immediately preceding stressors are critical for PTSD development, with childhood adversities being central. Second, they demonstrate that the development of PTSD symptoms shows heterogeneity, which indicates the need for multiple measurements to understand PTSD and identify people in need of treatment.

Commercially available wearable devices are marketed as a means of objectively capturing daily sleep easily and inexpensively outside of the laboratory. Two ecological momentary assessment studies—with 120 older adolescents (aged 18–19) and 395 younger adolescents (aged 10–16)—captured nightly self‐reported and wearable (Jawbone) recorded sleep duration. Self‐reported and wearable recorded daily sleep duration were moderately correlated (r ~ .50), associations which were stronger on weekdays and among young adolescent boys. Older adolescents self‐reported sleep duration closely corresponded with estimates from the wearable device, but younger adolescents reported having an hour more of sleep, on average, compared to device estimates. Self‐reported, but not wearable‐recorded, sleep duration and quality were consistently associated with daily well‐being measures. Suggestions for the integration of commercially available wearable devices into future daily research with adolescents are provided.

In the study reported here, we examined posttraumatic stress disorder (PTSD) symptoms in 746 Danish soldiers measured on five occasions before, during, and after deployment to Afghanistan. Using latent class growth analysis, we identified six trajectories of change in PTSD symptoms. Two resilient trajectories had low levels across all five times, and a new-onset trajectory started low and showed a marked increase of PTSD symptoms. Three temporary-benefit trajectories, not previously described in the literature, showed decreases in PTSD symptoms during (or immediately after) deployment, followed by increases after return from deployment. Predeployment emotional problems and predeployment traumas, especially childhood adversities, were predictors for inclusion in the nonresilient trajectories, whereas deployment-related stress was not. These findings challenge standard views of PTSD in two ways. First, they show that factors other than immediately preceding stressors are critical for PTSD development, with childhood adversities being central. Second, they demonstrate that the development of PTSD symptoms shows heterogeneity, which indicates the need for multiple measurements to understand PTSD and identify people in need of treatment.