In their meta-analysis of clinical versus statistical prediction models, Aegisdottir et al. (this issue) extended previous findings of statistical-method superiority across such variables as clinicians' experience and familiarity with data. In this reaction, the authors are particularly interested in violence prediction, which yields the greatest…

Assessing and treating bilingual children with speech and language disorders is difficult given the relative paucity of data on the speech and language skills of typically developing bilingual children and those with speech and language disorders. The purpose of this article is to review the research that is available with regard to clinical…

In 1994, R. G. Lord and P. E. Levy proposed a variant of control theory that incorporated human information processing principles. The current article evaluates the empirical evidence for their propositions and updates the theory by considering contemporary research on information processing. Considerable support drawing from diverse literatures…

Purpose: This article presents the results of a meta-analysis to determine the effect of augmentative and alternative communication (AAC) on the speech production of individuals with developmental disabilities. Method: A comprehensive search of the literature published between 1975 and 2003, which included data on speech production before, during,…

Historically, cognitive-developmental and behavior-analytic approaches to the study of human behavior change and development have been presented as incompatible alternative theoretical and methodological perspectives. This presumed incompatibility has been understood as arising from divergent sets of metatheoretical assumptions that take the form…

Proponents of the sociocultural model of eating disorders have suggested that ethnic differences in body dissatisfaction may be diminishing as the thin ideal of beauty becomes more widely disseminated among minority women. In a meta-analysis, the authors examined temporal trends in Black-White differences and also examined whether these…

This study quantitatively synthesized the empirical research of the gender effects on people's communicative, interactive, affective, and process patterns using computer-mediated communication (CMC). In total, 321 independent effect sizes were extracted from 50 studies involving a total of 63889 users exploring the gender difference in the use of…

A study implements meta-analytic methods to synthesize the findings and analyze the effects of interventions, including secondary teen pregnancy prevention programs, on educational achievement among unwed African American teen mothers. Results indicate that secondary teen pregnancy prevention programs and other interventions for adolescent mothers…

The purpose of this mixed-methods study was to document the prevalence of sampling designs utilised in mixed-methods research and to examine the interpretive consistency between interpretations made in mixed-methods studies and the sampling design used. Classification of studies was based on a two-dimensional mixed-methods sampling model. This…

A meta-analysis used Glassian techniques to compare the effectiveness of the whole-language approach to the direct-skills approach. A total of 21 studies included sufficient information to calculate effect sizes and included whole language approach as the independent variables with dependent variables relating to reading improvement. Results…

A quantitative research synthesis (meta-analysis) was conducted on the literature concerning the effects of feedback on learning from computer-based instruction (CBI). Despite the widespread acceptance of feedback in computerized instruction, empirical support for particular types of feedback information has been inconsistent and contradictory.…

The Department of Administrative and Policy Studies (APS), University of Pittsburgh (Pennsylvania), completed six research reports about its Conceptual Mapping Project. The reports reproduced here originally appeared in the "Occasional Paper Series" of the APS. They are presented in order of the chronological appearance as follows: (1)…

H. M. Cooper (1988) has developed a taxonomy that classified literature reviews based on six characteristics: (1) focus of attention; (2) goal of the synthesis; (3) perspective on the literature; (4) coverage of the literature; (5) organization of the perspective; and (6) intended audience. One hundred and three meta-analyses identified from the…

Five interrelated papers that explore the theme of validity within the context of cross-national assessments are grouped in this collection. These papers were presented at a symposium at the annual meeting of the American Educational Research Association. These papers draw on data from the Third International Mathematics and Science Study (TIMSS).…

The usefulness of the Cognitive Engagement in Cooperative Learning (CECL) model for evaluating the learning outcomes associated with various cooperative learning activities is explored. The instructions that a set of learners is given, however broad or specific, is called a script. These scripts are associated with different learning outcomes…