Focusing on expanding technical capabilities and new collaborative possibilities, we address 4 challenges for scientists who collect and use video records to conduct research in and on complex learning environments: (a) Selection: How can researchers be systematic in deciding which elements of a complex environment or extensive video corpus to…

Reexamines the studies of K. S. Dobson regarding metaanalysis of cognitive-behavioral therapy for depression using the Beck Depression Inventory as an outcome measure. Confirms Dobson's conclusions but shows that about half the difference between CT and other treatments was predictable from researcher allegiance. Comparable analysis of a later set…

Argues for a new approach to empirical work which focuses on classroom thoughtfulness. Proposes a conception of higher-order thinking that synthesizes theoretical literature with the views of practitioners. Offers a conceptual basis for empirical study of classrooms, teachers, students, and institutional leaders. (GG)

Spearman's "Law of Diminishing Returns" states that the g saturation of a test is greater for individuals with lower, rather than higher, test scores, and that it decreases with age. A common methodological problem in testing Spearman's "Law of Diminishing Returns" with respect to ability differentiation is how to create the…

This paper explores a wide range of issues associated with research on mental models. Based on a functional perspective, mental models are defined as the mechanisms whereby humans generate descriptions of system purpose and form, explanations of system functioning and observed system states, and predictions of future system states. Specifically,…