Using mixture models with known class membership to address incomplete covariance structures in multiple‐group growth models

Multi‐group latent growth modelling in the structural equation modelling framework has been widely utilized for examining differences in growth trajectories across multiple manifest groups. Despite its usefulness, the traditional maximum likelihood estimation for multi‐group latent growth modelling is not feasible when one of the groups has no response at any given data collection point, or when all participants within a group have the same response at one of the time points. In other words, multi‐group latent growth modelling requires a complete covariance structure for each observed group. The primary purpose of the present study is to show how to circumvent these data problems by developing a simple but creative approach using an existing estimation procedure for growth mixture modelling. A Monte Carlo simulation study was carried out to see whether the modified estimation approach provided tangible results and to see how these results were comparable to the standard multi‐group results. The proposed approach produced results that were valid and reliable under the mentioned problematic data conditions. We also present a real data example and demonstrate that the proposed estimation approach can be used for the chi‐square difference test to check various types of measurement invariance as conducted in a standard multi‐group analysis.     

Dynamic Social Networks in Recovery Homes

Acute treatment aftercare in the form of sober living environments—i.e., recovery houses—provide an inexpensive and effective medium-term treatment alternative for many with substance use disorders. Limited evidence suggests that house-situated social relationships and associated social support are critical determinants of how successful these residential experiences are for their members, but little is known about the mechanisms underlying these relationships. This study explored the feasibility of using dynamic social network modeling to understand house-situated longitudinal associations among individual Alcoholics Anonymous related recovery behaviors, length of residence, dyadic interpersonal trust, and dyadic confidant relationship formation processes. Trust and confidant relationships were measured 3 months apart in U.S. urban-area recovery houses, all of which were part of a network of substance use recovery homes. A stochastic actor-based model was successfully estimated from this data set. Results suggest that confidant relationships are predicted by trust, while trust is affected by recovery behaviors and length of residence. Conceptualizing recovery houses as a set of independent, evolving social networks that can be modeled jointly appears to be a promising direction for research.     

Beat It! Music Overloads Novice Dancers

Together with melody, harmony, and timbre, rhythm and beat provide temporal structure for movement timing. Such musical features may act as cues to the phrasing and dynamics of a dance choreographed to the music. Novice dancers (N = 54) learned to criterion a novel 32‐s dance‐pop routine, either to full music or to the rhythm of that music. At test, participants recalled the dance to the same music, rhythm, new music, and in silence. If musical features aid memory, then full music during learning and test should result in superior dance recall, whereas if rhythm alone aids memory, then rhythm during learning and test should result in superior recall. The presence of a rhythm accompaniment during learning provided a significantly greater memory advantage for the recall of dance‐pop steps than full music. After learning to full music, silence at test enhanced recall. Findings are discussed in terms of entrainment and cognitive load. Copyright © 2014 John Wiley & Sons, Ltd.     

Coping With Vicarious Trauma in the Aftermath of a Natural Disaster

This study documents the vicarious psychological impact of the 2010 earthquake in Haiti on Haitians living in the United States. The role of coping resources—family, religious, and community support—was explored. The results highlight the importance of family and community as coping strategies to manage such trauma. Este estudio documenta el impacto psicológico vicario que tuvo el terremoto de 2010 en Haití sobre los residentes haitianos que viven en Estados Unidos. Se explora el papel de los recursos de afrontamiento—apoyo familiar, religioso y comunitario. Lo resultados destacan la importancia de la familia y la comunidad como estrategias de afrontamiento para superar un trauma de esas características.     

Minimal functional brain differences between older adults with and without mild cognitive impairment during the stroop

This investigation compared the neural correlates of inhibition in normal older adults (OAs) and OAs with mild cognitive impairment (MCI). It was hypothesized the MCI group would require a greater amount of resources for inhibition, and therefore display greater functional activation in specific regions of interest (ROIs). Twenty-six OAs without and 17 with MCI completed the Stroop task during functional neuroimaging, and completed additional out-of-scanner neuropsychological measures. During inhibition, there were minimal functional Magnetic Resonance Imaging (fMRI) differences found between groups in a priori specified ROIs and with post-hoc multiple regression analyses. However, these minimal differences did not survive corrected thresholds. Robust differences were found with several tasks of a neuropsychological screening battery. The results of this study suggest only very minimal group differences in fMRI activation during inhibition which may not reliably identify MCI, and this condition may be best detected by traditional neuropsychological techniques.     

Interaction of Socio-structural Characteristics Predicts Identity Concealment and Self- Esteem in Stigmatized Minority Group Members

The present research investigated the relationship between socio-structural characteristics of intergroup differences, identity concealment, and self-esteem in members of a stigmatized minority group. Structural equation modeling of survey responses collected at a convention showed that socio-structural characteristics interact to predict concealment strategies as a way of managing perceived stigma. Perceived permeability of intergroup boundaries predicted increased endorsement of concealment, moderated by the legitimacy and stability of intergroup status differences. Interacting socio-structural characteristics also predicted self-esteem, an effect mediated by identity concealment. The results illustrate that socio-structural characteristics can help predict stigmatized minority group members’ endorsement of identity concealment despite its potentially maladaptive effects.     

Maternal Depressive Symptoms and Child Externalizing Problems: Moderating Effects of Emotionally Maltreating Parenting Behaviors

While prior research has examined the relationship between maternal depressive symptoms and child externalizing behaviors, little research has focused specifically on the moderating effects of observed parenting behaviors on this relationship. This study was conducted to investigate the role of emotionally maltreating parenting behaviors, which were hypothesized to exacerbate the strength of the relationship between maternal depressive symptoms and child behavior problems. Maternal depressive symptoms, child externalizing problems, and emotionally maltreating parenting behaviors were assessed in a community sample of 62 mother–child dyads (with children age 8–11 years). Results indicated the overall model was significant, after controlling for maternal race, as was the interaction between maternal depressive symptoms and emotionally maltreating parenting behaviors. Based on these findings, future research is needed to identify potential protective factors that may prevent depressive symptoms from negatively affecting parenting behaviors, with the attendant goal of decreasing risk for emotional maltreatment.     

Gaze direction and the extraction of egocentric distance

The angular declination of a target with respect to eye level is known to be an important cue to egocentric distance when objects are viewed or can be assumed to be resting on the ground. When targets are fixated, angular declination and the direction of the gaze with respect to eye level have the same objective value. However, any situation that limits the time available to shift gaze could leave to-be-localized objects outside the fovea, and, in these cases, the objective values would differ. Nevertheless, angular declination and gaze declination are often conflated, and the role for retinal eccentricity in egocentric distance judgments is unknown. We report two experiments demonstrating that gaze declination is sufficient to support judgments of distance, even when extraretinal signals are all that are provided by the stimulus and task environment. Additional experiments showed no accuracy costs for extrafoveally viewed targets and no systematic impact of foveal or peripheral biases, although a drop in precision was observed for the most retinally eccentric targets. The results demonstrate the remarkable utility of target direction, relative to eye level, for judging distance (signaled by angular declination and/or gaze declination) and are consonant with the idea that detection of the target is sufficient to capitalize on the angular declination of floor-level targets (regardless of the direction of gaze).