Regularized Finite Mixture Models for Probability Trajectories

Finite mixture models are widely used in the analysis of growth trajectory data to discover subgroups of individuals exhibiting similar patterns of behavior over time. In practice, trajectories are usually modeled as polynomials, which may fail to capture important features of the longitudinal pattern. Focusing on dichotomous response measures, we propose a likelihood penalization approach for parameter estimation that is able to capture a variety of nonlinear class mean trajectory shapes with higher precision than maximum likelihood estimates. We show how parameter estimation and inference for whether trajectories are time-invariant, linear time-varying, or nonlinear time-varying can be carried out for such models. To illustrate the method, we use simulation studies and data from a long-term longitudinal study of children at high risk for substance abuse. This work was supported in part by NIAAA grants R37 AA07065 and R01 AA12217 to RAZ.     

Blended families/Sarah,Hagar, and all that...

A rabbi/chaplain listens to a 21st century woman tell about some complexities encountered in the blended family dynamics. He reminds her that such stressful phenomena are not as new as many believe, illustrating his point by interpreting the biblical account of Sarah and Hagar, noting particularly that some of the same decisions and actions taken in ancient times may still provide authentic insights to current family dynamics today.     

Behavioral and Emotional Problems on the Teacher’s Report Form: A Cross-National,Cross-Clinic Comparative Analysis of Gender Dysphoric Children and Adolescents

For gender dysphoric children and adolescents, the school environment may be challenging due to peer social ostracism and rejection. To date, information on the psychological functioning and the quality of peer relations in gender dysphoric children and adolescents has been studied via parental report, peer sociometric methods, and social interactions in laboratory play groups. The present study was the first cross-national investigation that assessed behavior and emotional problems and the quality of peer relations, both measured by the Teacher’s Report Form (TRF), in a sample of 728 gender dysphoric patients (554 children, 174 adolescents), who were referred to specialized gender identity clinics in the Netherlands and Canada. The gender dysphoric adolescents had significantly more teacher-reported emotional and behavioral problems than the gender dysphoric children. In both countries, gender dysphoric natal boys had poorer peer relations and more internalizing than externalizing problems compared to the gender dysphoric natal girls. Furthermore, there were significant between-clinic differences: both the children and the adolescents from Canada had more emotional and behavioral problems and a poorer quality of peer relations than the children and adolescents from the Netherlands. In conclusion, gender dysphoric children and adolescents showed the same pattern of emotional and behavioral problems in both countries. The extent of behavior and emotional problems was, however, higher in Canada than in the Netherlands, which appeared, in part, an effect of a poorer quality of peer relations. Per Bronfenbrenner’s (American Psychologist, 32, 513–531, 1977) ecological model of human development and well-being, we consider various interpretations of the cross-national, cross-clinic differences on TRF behavior problems at the level of the family, the peer group, and the culture at large.     

A Pilot Study of an Acceptance-Based Separated Family Treatment for Adolescent Anorexia Nervosa

The treatment of adolescent anorexia nervosa (AN) has improved significantly with the increased emphasis on family-based intervention. Yet despite advances, a substantial number of adolescents do not respond optimally to existing treatment models and thus there is a need for treatment alternatives that address barriers to recovery. We developed and piloted an acceptance-based separated family treatment (ASFT) with 6 adolescents with AN or subthreshold AN (eating disorder not otherwise specified, with the primary symptoms of restriction and severe weight loss). Treatment acceptability was adequate. Overall, parents rated the treatment as credible and expected improvement in their child's condition. Five of the 6 adolescents treated with ASFT restored weight to their ideal body mass index as indicated by age, height, and sex and determined by individual growth charts. Many demonstrated improved psychological health and adaptive functioning. There was evidence of broad effects, with parents reporting decreased anxiety and caregiver burden. ASFT holds promise as a treatment option for AN. The efficacy of this therapeutic approach should be tested in larger trials and compared to current family-based interventions to determine unique effects.     

College Students’ motivational beliefs and use of goal-oriented control strategies: Integrating two theories of motivated behavior

Motivation and Emotion - In college, students often encounter situations in which they struggle to meet their academic goals in difficult courses. We integrate the Motivational Theory of Life-Span...     

Traumaadaptierte tiefenpsychologisch fundierte und analytische Psychotherapie

The authors discuss the question which criteria should apply to the depth psychologically oriented psychotherapy (TP) and to the analytic psychotherapy (AT) in order to guarantee a state-of-the-art treatment for traumatized patients on the basis of latest scientific research. Specific demands and modifications of the two guideline treatment methods arise from the scientific findings of interdisciplinary research projects bringing together psychobiological research results and models with concepts and results from empirical psychotherapy research.When TP and AP were conceived, an interdisciplinary concept was still out of reach. In the meantime there exist elaborated traumaspecific concepts for TP/AP and show promising empirical research findings.The adaptation of TP/AP to the demands of trauma patients should proceed in the opinion of the authors under the following term: “As much reform as necessary, as much tradition as possible”, so as not to endanger valuable and proven treatment principles of both methods.