Longitudinal examination of the exercise and self-esteem model in middle-aged women

This 2-year prospective study examined the exercise and self-esteem model in middle-aged women (N = 143) previously enrolled in a randomized controlled exercise trial. Across the 2-year period, increases in physical activity (PA) and self-efficacy and reductions in body mass index (BMI) were associated with improved subdomain self-perceptions relative to physical condition, and reductions in BMI were associated with improved subdomain self-perceptions relative to physical condition and body attractiveness. The effects of PA, self-efficacy, and BMI on changes in physical self-worth and global self-esteem were mediated by changes in self-perceptions relative to physical condition and body attractiveness. The results of this longitudinal analysis support the hierarchical and multidimensional structure of self-esteem and indicate that middle-aged women can enhance how they perceive their condition and body attractiveness by continued participation in physical activity, increasing their self-efficacy, and maintaining healthy BMI levels.     

When talking less is more: exploring outcomes of Twitter usage in the large‐lecture hall

This article employs a mixed‐method approach to examine the outcomes produced by using Twitter in a large‐lecture course as a means to assess the pedagogical impact and potential of Twitter’s contribution to large‐lecture course dynamics. In doing so, it seeks also to explore the broader relationship between methodologies and outcomes. Exploratory in nature and design, this study proceeds from the recognition of the inherent limitations and unpredictability in investigating how new technologies transform social patterns. Such an approach allows us to question how the mode and design of our research ultimately frame the interpretation and understanding of how social media intersect and impact classroom dynamics and their potential contributions for developing more effective pedagogical strategies and outcomes.