Assessed the validity of Hackman and Oldham's Job Characteristics Model by conducting a comprehensive review of nearly 200 relevant studies on the model as well as by applying meta-analytic procedures to much of the data. Available correlational results were reasonably valid and support the multidimensionality of job characteristics and their…

The original authors respond to a critique of their meta-analysis of 94 studies which had failed to support the presence of distinctive Wechsler Intelligence Scale for Children profiles for learning disabled children. The critique contended such a pattern does exist. (Author/DB)

As part of a continuing dialog concerning the validity of a meta-analysis of 94 studies suggesting that there is a lack of any distinctive pattern in the Wechsler Intelligence Scale for Children (Revised) profiles for learning disabled children, this article maintains the view that such differences do exist. (DB)

The meta-analysis investigated the effects on achievement of type of graphing paper employed in displaying student performance data collected over time based on 15 controlled studies with 16 effect sizes. No significant differences in student achievement were found between studies using six-cycle and studies using equal interval paper graphing…

A quantitative synthesis of fourteen studies was conducted to estimate the quasi-experimental and experimental effects of teachers' questioning strategies on academic achievement. Effects of predominantly higher order questions versus predominantly factual questions were examined. Results are discussed. (Author/MT)

Fifty-three research studies on feedback timing and verbal learning underwent meta-analysis. Applied studies using actual classroom quizzes and real learning materials found immediate rather than delayed feedback to be more effective; experimental studies of acquisition of test content indicate the opposite. Laboratory studies of list learning…

Results: (1) indicate a causal role for phonological processing abilities in the acquisition of word analysis and word recognition skills; and (2) document the relative neglect of causal roles for the acquisition of reading skills in the subsequent development of phonological processing abilities. (RH)

This article discusses the limitations of 14 randomized controlled trials of exercise rehabilitation for patients who sustained myocardial infarction. The difficulty of sampling patients and controlling the sample size is discussed and the benefits of pooled statistical evidence are considered. (JL)

The commentator finds that Slavin's synthesis is limited by its failure to distinguish between school and classroom organization and classroom instruction as well as the lack of consideration of intervening circumstances. (SLD)

Presents a two-pronged attempt to synthesize the research on stress coping: (1) a review of models and taxonomies of behaviors and resources related to stress coping and (2) a meta-analysis of recent experimental and quasi-experimental studies of stress coping. A taxonomy and a model of stress coping are offered, and implications for treatment are…

Analyzes results from 38 distraction studies. Concludes it is necessary to distinguish between communication-relevant and communication-irrelevant distractors. Suggests the effect of communication-irrelevant distractors on attitude change is minor. (MS)

Analysis of 326 studies of early intervention efficacy indicated significant positive benefits for most children but little evidence to support some common beliefs (such as the superiority of very early intervention or the necessity for parental involvement). Application of the steps in the scientific method are recommended for such large scale…

Meta-analysis was used to statistically integrate the findings of 30 studies of language intervention efficacy in mentally retarded preschool children. Results indicated that (1) intervention has positive, immediate gains for retarded children and that (2) significant neurological involvement may impede intervention success. (Author/DB)

The paper discusses problems resulting from the substitution of meta-analysis for qualitative reviewing of special education research, employing H. Cooper's framework for assessing integrative research review and using illustrations from research on class placement and mainstreaming. (Author/CL)

The authors cite problems but regard meta-analysis as an improvement over traditional methods of research integration. Advantages are increased objectivity, freedom from arbitrary levels of statistical significance, and potential to relate an array of independent variables to effect size. Disadvantages include questionable reliability of ratings…