Facilitating Collaborative Knowledge Building

This article describes a detailed analysis of knowledge building in a problem-based learning group. Knowledge building involves increasing the collective knowledge of a group through social discourse. For knowledge building to occur in the classroom, the teacher needs to create opportunities for constructive discourse in order to support student learning and collective knowledge building. In problem-based learning, students learn through collaborative problem solving and reflecting on their experiences. The setting for this study is a group of second-year medical students working with an expert facilitator. The analysis was designed to understand how the facilitator provided opportunities for knowledge-building discourse and how the learners accomplished collective knowledge building. We examined episodes of knowledge-building discourse, the questions and statements that the students and facilitator generated throughout the tutorial, the change in their understanding of the problem that they were solving, and the collective knowledge that was constructed. The results indicate that the group worked to progressively improve their ideas through engaging in knowledge-building discourse. The facilitator helped support knowledge building through asking open-ended metacognitive questions and catalyzing group progress. Students took responsibility for advancing the group's understanding as they asked many high-level questions and built on each others thinking to construct collaborative explanations. The results of this study provide suggestions for orchestrating knowledge-building discourse.     

Using Principal Components as Auxiliary Variables in Missing Data Estimation

To deal with missing data that arise due to participant nonresponse or attrition, methodologists have recommended an “inclusive” strategy where a large set of auxiliary variables are used to inform the missing data process. In practice, the set of possible auxiliary variables is often too large. We propose using principal components analysis (PCA) to reduce the number of possible auxiliary variables to a manageable number. A series of Monte Carlo simulations compared the performance of the inclusive strategy with eight auxiliary variables (inclusive approach) to the PCA strategy using just one principal component derived from the eight original variables (PCA approach). We examined the influence of four independent variables: magnitude of correlations, rate of missing data, missing data mechanism, and sample size on parameter bias, root mean squared error, and confidence interval coverage. Results indicate that the PCA approach results in unbiased parameter estimates and potentially more accuracy than the inclusive approach. We conclude that using the PCA strategy to reduce the number of auxiliary variables is an effective and practical way to reap the benefits of the inclusive strategy in the presence of many possible auxiliary variables.     

The Baby Boomers Meet Menopause: Fertility, Attractiveness, and Affective Response to the Menopausal Transition

The purpose of this study was to identify social factors that affect women’s concerns about menopause. Data from a sample of 1,037 baby-boomer women who took part in two waves of the Midlife in the United States survey (MIDUS) were utilized. Two waves of survey data were collected in 1996 and 2005 from a nationally representative sample of women born between 1946 and 1964 residing in the United States. Women’s concerns about the effects of menopause on attractiveness, fertility, and the cessation of menstruation were examined. Analyses were replicated in Wave I and II of the study. Women who occupied multiple roles had fewer concerns about the loss of fertility. Women who had more symptoms were significantly more concerned about the effects of menopause on attractiveness. Concerns about the effects of menopause were also related significantly to women’s age, education, and financial security.     

Infantile Trauma,Therapeutic Impasses and Recovery

Throughout his writings Ferenczi examines the role of the mother–infant relationship in healthy development as well as the difficulties that occur when that relationship is problematic. This paper using Ferenczi and Bion as theoretical background explores the clinical development of impasse in the treatment of hard to reach patients. These patients present special difficulty for analysis because they are not self reflective although they can be addicted to “processing,” which is in lieu of emotional connection. Impasse occurs when the analyst does not detect the mimicry involved in processing. The paper offers the idea of recovery, rather than repair, in that such patients have “gone missing” in infancy. Recovery of lost potential can be found in relationship with the analyst and with significant others.