Does self-complexity moderate the effects of exposure to political violence for adolescents?

This study examined the moderating role of self-complexity (SC) on well-being (WB) and psychopathology among Israeli adolescents exposed to the Second Lebanon War (2006). Adolescents (N=584, mean age 16.41) completed a SC measure, Political and Negative Life Events (NLE) scales, Brief Symptom Inventory and Satisfaction with Life Scale. The theoretical model analyzed the function of SC as a moderator of exposure effects to political life events (PLE), while controlling for general NLE. Results corroborated the model with SC moderating the effects of the war-related PLE. Adolescents with low SC are at risk for damaged WB and psychiatric consequences from political violence exposure. This opens a diagnostic avenue for identification of at-risk adolescents in this socio-political context toward whom clinical programs should be directed.     

Both young and older adults discount suggestions from older adults on a social memory test

In the present study, we examined the impacts of participant age and confederate age on social memory processes. During a collaborative recall phase, young and older adult participants were exposed to the erroneous memory reports of a young or an older adult confederate. On a subsequent individual recall test, young and older adult participants were equally likely to incorporate the confederates’ erroneous suggestions into their memory reports, suggesting that participant age had a minimal effect on social memory processes. However, confederate age did have a marked effect: Young adult participants were less likely to incorporate misleading suggestions from older adult confederates and less likely to report “remembering” items suggested by older adult confederates. Critically, older adult participants were also less likely to incorporate misleading information from fellow older adult confederates. Both young and older adult participants discounted older adult confederates’ contributions to a memory test.     

A Longitudinal Investigation of Posttraumatic Growth in Adult Patients Undergoing Treatment for Acute Leukemia

An acute leukemia diagnosis can be an extremely stressful experience for most patients. Posttraumatic growth (PTG) is positive psychological change experienced following a struggle with highly challenging life circumstances. The current study is the first longitudinal investigation of predictors of PTG and distress in adult acute leukemia patients undergoing induction chemotherapy. Findings suggest that these patients report PTG, and levels of PTG appear to increase over the weeks following leukemia diagnosis and induction chemotherapy. Variables associated with higher total PTG scores over time included greater number of days from baseline, younger age, and greater challenge to core beliefs. Variables associated with higher distress included greater number of days from baseline, greater perceived cancer threat, higher symptom severity, and lower spiritual well-being. Results underscore the critical role that examination of one’s core beliefs may play in the development of PTG over time.     

Fostering Social Competence in Preschool Children Exposed to Intimate Partner Violence: Evaluating the Preschool Kids' Club Intervention

This study assessed whether participation in an intervention program enhanced social competence in 113 preschool-aged children who were exposed to intimate partner violence. Change in competence was evaluated from baseline to approximately five weeks postbaseline and compared preschool children who did and did not receive intervention services. Protective factors, such as exposure to less severe violence, were identified that predicted change in competence scores. Results indicated that children with the highest social competence pre-intervention exhibited a significant increase in their postintervention scores, if they participated in the program. The extent of this change was predicted by a higher preintervention score and exposure to less severe violence. This study indicates that even short-term intervention could result in meaningful change in key aspects of child functioning.     

Psychophysiological Reactivity to Abuse-Related Stimuli in Sexually Revictimized Women

Prior research shows discrepant findings in relation to psychophysiological reactivity to threat in women with histories of sexual victimization. Women ages 18 to 22 (N?=?123) with histories of sexual abuse were categorized into child sexual abuse (CSA), adult sexual victimization, revictimization, or nonvictimization groups. Low- and high-frequency heart rate variability were measured at baseline and during an Emotional Stroop task of abuse-related words. Revictimized women showed a significant decrease from baseline to task in both parasympathetic and sympathetic measures when compared to the CSA group. The CSA group demonstrated chronic sympathetic activation at both baseline and task, relative to the revictimization group. Groups did not differ on performance (i.e., reaction time) on the Emotional Stroop task (i.e., more threatening stimuli, slower performance). Cardiovascular responses reported might point to biological reactivity patterns needed for women with a history of sexual abuse to cope with abuse-related stimuli.     

Do Affiliative and Autonomous Styles Relate to Peer Relational Victimization and Aggression?

This study considers whether established depressogenic personal styles based on Beck’s theory of autonomy and sociotropy relate to peer relational victimization and aggression. A diverse emerging adult sample was administered a computer-based survey. Latent profile analysis revealed affiliative, autonomous, and more balanced personal styles. Autonomous and affiliative style participants reported greater peer relational aggression than balanced style participants. Peer relational victimization mediated autonomous style differences in peer relational aggression. Additionally, peer relational victimization mediated the affiliative style difference in peer relational aggression among males and depressed females. Finally, the effect of peer relational victimization on relational aggression was greatest among depressed affiliative and depressed autonomous adults. Results highlight the potential that personal styles relate to depression risk pathways for peer relational victimization and aggression.     

Quantifying and Testing Indirect Effects in Simple Mediation Models When the Constituent Paths Are Nonlinear

Most treatments of indirect effects and mediation in the statistical methods literature and the corresponding methods used by behavioral scientists have assumed linear relationships between variables in the causal system. Here we describe and extend a method first introduced by Stolzenberg (1980) Stolzenberg, R. M. 1980. The measurement and decomposition of causal effects in nonlinear and nonadditive models.. Sociological Methodology, 11: 459–488. [Crossref] , [Google Scholar] for estimating indirect effects in models of mediators and outcomes that are nonlinear functions but linear in their parameters. We introduce the concept of the instantaneous indirect effect of X on Y through M and illustrate its computation and describe a bootstrapping procedure for inference. Mplus code as well as SPSS and SAS macros are provided to facilitate the adoption of this approach and ease the computational burden on the researcher.     

Addressing Moderated Mediation Hypotheses: Theory,Methods, and Prescriptions

This article provides researchers with a guide to properly construe and conduct analyses of conditional indirect effects, commonly known as moderated mediation effects. We disentangle conflicting definitions of moderated mediation and describe approaches for estimating and testing a variety of hypotheses involving conditional indirect effects. We introduce standard errors for hypothesis testing and construction of confidence intervals in large samples but advocate that researchers use bootstrapping whenever possible. We also describe methods for probing significant conditional indirect effects by employing direct extensions of the simple slopes method and Johnson-Neyman technique for probing significant interactions. Finally, we provide an SPSS macro to facilitate the implementation of the recommended asymptotic and bootstrapping methods. We illustrate the application of these methods with an example drawn from the Michigan Study of Adolescent Life Transitions, showing that the indirect effect of intrinsic student interest on mathematics performance through teacher perceptions of talent is moderated by student math self-concept.     

A Comparison of Multilevel Imputation Schemes for Random Coefficient Models: Fully Conditional Specification and Joint Model Imputation with Random Covariance Matrices

Abstract

Literature addressing missing data handling for random coefficient models is particularly scant, and the few studies to date have focused on the fully conditional specification framework and “reverse random coefficient” imputation. Although it has not received much attention in the literature, a joint modeling strategy that uses random within-cluster covariance matrices to preserve cluster-specific associations is a promising alternative for random coefficient analyses. This study is apparently the first to directly compare these procedures. Analytic results suggest that both imputation procedures can introduce bias-inducing incompatibilities with a random coefficient analysis model. Problems with fully conditional specification result from an incorrect distributional assumption, whereas joint imputation uses an underparameterized model that assumes uncorrelated intercepts and slopes. Monte Carlo simulations suggest that biases from these issues are tolerable if the missing data rate is 10% or lower and the sample is composed of at least 30 clusters with 15 observations per group. Furthermore, fully conditional specification tends to be superior with intraclass correlations that are typical of crosssectional data (e.g., ICC?=?.10), whereas the joint model is preferable with high values typical of longitudinal designs (e.g., ICC?=?.50).