Model uncertainty and multimodel inference in reliability estimation within a longitudinal framework

Laenen, Alonso, and Molenberghs (2007) and Laenen, Alonso, Molenberghs, and Vangeneugden (2009) proposed a method to assess the reliability of rating scales in a longitudinal context. The methodology is based on hierarchical linear models, and reliability coefficients are derived from the corresponding covariance matrices. However, finding a good parsimonious model to describe complex longitudinal data is a challenging task. Frequently, several models fit the data equally well, raising the problem of model selection uncertainty. When model uncertainty is high one may resort to model averaging, where inferences are based not on one but on an entire set of models. We explored the use of different model building strategies, including model averaging, in reliability estimation. We found that the approach introduced by Laenen et al. (2007, 2009) combined with some of these strategies may yield meaningful results in the presence of high model selection uncertainty and when all models are misspecified, in so far as some of them manage to capture the most salient features of the data. Nonetheless, when all models omit prominent regularities in the data, misleading results may be obtained. The main ideas are further illustrated on a case study in which the reliability of the Hamilton Anxiety Rating Scale is estimated. Importantly, the ambit of model selection uncertainty and model averaging transcends the specific setting studied in the paper and may be of interest in other areas of psychometrics.     

Motivational enhancement treatment in outpatient addiction centers: A multisite randomized trial

Background/Objectives: Motivational Enhancement Treatment in Spanish (METS) is a brief intervention aimed at resolving patient ambivalence towards behavior change that has demonstrated efficacy in substance use disorder treatment to reduce use and increase treatment engagement in different populations. In order to have evidence for its implementation in Mexico, a multi-site, randomized, two-arm, controlled clinical trial was conducted at three outpatient addiction treatment centers in the country to compare the effect of METS with Counseling as Usual (CAU). Method: One hundred and twenty patients were randomized to receive three sessions of METS (n = 54) or CAU (n = 66) during the first four weeks of treatment and were assessed during the following 12 weeks. Primary outcome measures were self-reported days of substance use and of treatment services utilization, which were tested using Generalized Estimating Equations. Results: Results associated both conditions with significant changes in substance use over, whereas there were no differences between conditions in substance use or in service utilization. Conclusions: Findings do not support the hypothesis that METS is more effective than CAU, but suggest that brief interventions at treatment initiation may improve patient outcomes.     

Free-association norms for the Spanish names of the Snodgrass and Vanderwart pictures.

The most frequent names in Spanish corresponding to a set of 247 pictures in the Snodgrass and Vanderwart (1980) norms were used as stimuli in a discrete free-association task. A sample of 525 Spanish-speaking participants provided the first word that came to mind for each of the verbal stimuli. Responses were organized according to frequency of production in order to prepare word-association norms for the set of stimuli.     

The shattered mirror: Treatment of a group of narcissistic patients

Increasingly, group psychotherapy takes its place as a valid treatment model for patients with severe character pathology. This paper explores the impact of group treatment on a homogeneous group of patients with narcissistic character problems. The clinical example serves to illustrate the particular dynamics of this patient population; addresses the challenges inherent in treating these patients in a homogeneous, long-term therapy group; and, finally, underscores the countertransference pitfalls in such a clinical situation. Nonetheless, the successful working through of some of these patients' terrifying pathology supports the important of continuing experience and research into this arena.The author wishes to acknowledge with gratitude the invaluable assistance of J. Scott Rutan, Ph.D., in the planning and preparation of this clinical report.     

Sequential cotherapy of groups for training and clinical care

Cotherapy has often been used as the leadership model in group therapy. The literature is full of contradictory data and impressions as to the efficacy of this model. In this article a new form of cotherapy is presented which may offer some of the assets attributed to the cotherapy leadership model while at the same time reducing some of the liabilities. Sequential cotherapy refers to cotherapy when each of the therapists leads sequentially rather than at the same time. The pros and cons of such an approach are discussed from both the perspectives of training new group therapists and of service to patients in groups.Dr. Rutan and Mrs. Alonso are members of the faculty of Harvard University Medical School and share responsibility for training psychiatric residents in group therapy at Massachusetts General Hospital, Boston, Massachusetts.     

Atribución de la causalidad y motivación de logro. II: Estudio evolutivo de la influencia de las atribuciones en el nivel manifiesto de motivación de logro

Resumen

Este artículo incluye dos estudios sobre las relaciones entre la motivación de logro y las atribuciones causales realizados desde una perspectiva evolutiva. En ambos se han examinado 180 sujetos, 60 de 1.°, 60 de 3.° y 60 de 5.° de ECB. El primero, como se esperaba, ha mostrado que sólo desde 5.° de EGB las diferencias existentes dentro de cada una de las variables estudiadas se relacionan igual que en ios adultos, siendo más frecuente la atribución de los resultados al «esfuerzo» en el caso de sujetos con alta motivación. Igualmente han aparecido diferencias significativas entre las atribuciones de ambos grupos de sujetos en I.° de ECB a la «dificultad de la tarea», siendo menor este tipo de atribución en caso de motivación baja. Se ha sugerido una explicación para este resultado no esperado. En el segundo estudio, los resultados no han sido concluyentes en relación con la hipótesis propuesta. Ante este hecho se ha sugerido y comentado una posible explicación.     

Estudio sobre la validez de constructo de los cuestionarios MAPE,EAT y ECO

Resumen

Este artículo presenta un estudio sobre la validez de constructo de los cuestionarios MAPE, EAT y ECO. Mediante el análisis de las correlaciones entre las escalas de estos cuestionarios se ponen a prueba los supuestos de distintas teorías sobre las relaciones entre motivos relacionados con el logro, patrones atributivos y expectativas de control. Los resultados son consistentes con la teoría de Dweck y Elliot en la mayoría de los casos. También ponen de manifiesto que la atribución del fracaso a la falta de esfuerzo puede deberse a diferentes causas, dadas las implicaciones psicológicas encontradas, lo que constituye un resultado no esperado. Finalmente, se comentan las implicaciones de los resultados para la investigación y para el uso aplicado de estos cuestionarios.     

Reuse and Recycle: The Development of Adaptive Expertise,Routine Expertise,and Novelty in a Large Research Team

Combining innovation and efficiency is ideal in many organizational settings. Adaptive expertise represents a cognitive explanation of how individuals and teams can learn to achieve simultaneous innovation and efficiency. In 2004, scientists led twin rovers on Mars in the search for historical water. The science team experienced a remarkable increase in efficiency, adapting with flexibility to unexpected events and dynamic, dwindling resources. After discussing the conceptual differences between adaptive expertise and related team learning and innovation concepts, we examine longitudinal behavioral data on novelty, routine and adaptive expertise. Sequential time series ARIMA analyses reveal that novelty fluctuated randomly, but both routine and adaptive expertise significantly increased over time. In addition, novelty, routine expertise, and adaptive expertise did not significantly predict each other directly or at a lag, suggesting that these are indeed three distinct constructs. Implications for theory and research on efficiency and innovation are discussed. Copyright © 2013 John Wiley & Sons, Ltd.