This paper advocates for the adoption of Nexus Analysis as a robust analytical framework in Problem-Based Learning (PBL) research. Developed by Scollon and Scollon, Nexus Analysis offers a unique lens for examining the intricate dynamics of PBL by seamlessly integrating micro-level interactions with macrolevel societal discourses. The approach…

This study describes a method for incorporating external estimates of intraclass correlation to improve the precision for the analysis of an existing group-randomized trial. The authors use a random-effects meta-analytic approach to pool the information across studies, which takes into account any interstudy heterogeneity that may exist. This…

This study was designed to examine the nature of nonverbal social interaction between mothers and infants and to compare various situational effects. A total of ten 3-month-old twin infants (five male and five female) and their mothers were videotaped in their homes during free play, bottle feeding and spoon feeding situations. A repeated measures…

All available research in which a therapeutic expectancy was directly assessed and than related to a measure of outcome was reviewed. The review revealed that across all studies both client and therapist expectancies appear related to improvement; however, in the better-designed research a differential pattern emerges in which client expectancy no…

Statistical procedures are presented for determining ordinal and disordinal aptitude-treatment interactions with linear and curvilinear data. The paper presents a method for testing the homogeneity of group regressions for a single aptitude and provides models for expanding this test to linear and curvilinear regression planes. Procedures are…