Meta-analytic techniques were used to analyze the effects of age, education, and work experience on General Aptitude Test Battery (GATB) validities and test scores. The sample consisted of 30,568 subjects from 143 Specific Aptitude Test Battery (SATB) validation or revalidation studies analyzed since 1972. The effect of these three variables on…

The relatively simple question of whether sex differences exist has evolved into the more theoretically interesting question of why sex differences occur. This transition has come about because of the meta-analytic investigations of sex differences in social behavior which established sex difference trends in a variety of social behaviors. Many…

Meta-analysis is a technique for combining the summary statistics from previously conducted research studies to indicate the direction of results and provide an index of the magnitude of effect size. This paper focuses on the effect of the violation of the assumption of independence (that the value of any included statistic is in no way…

Drawing from work on the meta-analysis of over 500 validation studies of the General Aptitude Test Battery (GATB) by the U.S. Employment Service, the paper presents a methodological message and a substantive message. Gene Glass's methods, as used by Edwin Ghiselli in personnel selection, ignore study artifacts (sampling error, error of…

This monograph includes chapters on: (1) The Need for Educational Productivity Research; (2) Syntheses of Research on Factors Influencing Learning; (3) Contextual and Transactional Influences on Science Outcomes; (4) Identifying the Salient Facets of a Model of Student Learning: A Synthesis of Meta-Analysis; and (5) Use of National Survey Data in…

Answers James Stiff's criticism of the Elaboration Likelihood Model (ELM) of persuasion. Corrects certain misperceptions of the ELM and criticizes Stiff's meta-analysis that compares ELM predictions with those derived from Kahneman's elastic capacity model. Argues that Stiff's presentation of the ELM and the conclusions he draws based on the data…

To identify variables influencing the acquisition of teaching skills, 26 studies addressing the acquisition of the generic skill of questioning were synthesized through meta-analysis. The training variables considered include general effect, method, duration, number of sessions, experience and academic certification levels of trainees, and…

Major issues in models of student learning (Carroll's, Bloom's, and Glaser's models) are discussed, and a model that retains the salient features of these models (time, prior learning, and learning processes) is outlined. The final model also addresses other facets having unique effects on achievement and interactions among facets. (TJH)

Used meta-analyses to determine the effectiveness of behavioral marital therapy (BMT) and premarital intervention (BPI) studies. Found gains that were generally maintained over time, and equal for couples in Europe and the United States. Demonstrated higher effect sizes for comparisons of BMT with no treatment placebo control groups, whereas the…

Review of research of between-class and within-class ability grouping on the achievement of elementary students. Ability grouping appears most effective for specific subjects with students remaining in heterogeneous classes most of the day. Cross-grade assignment for selected subjects can increase achievement. (SLD)

Slavin's 1987 review of research of between- and within-class ability grouping on achievement of elementary students is discussed, and its assumptions examined. It is suggested that recent theory and research make the Slavin review most useful from the perspective of historical analysis. (SLD)

The Early Intervention Research Institute (EIRI) reviewed extensive data reported by early intervention projects. Among surprising findings were that half-day programs produced as many gains as full-day programs, and programs which expected parent involvement were not more effective than those which did not. Current EIRI research efforts are…

Reviews evaluation studies, box-score reviews, and meta-analyses on effectiveness of computer-assisted instruction (CAI) conducted from the 1960s through 1980s, using student achievement as a dependent measure. Conclusions are drawn as to CAI's effectiveness with regard to social and academic achievement and a cost analysis of CAI is provided. (29…

This article discusses the circumstances under which unequal sample size in the two-group study can arise and result in an attenuated point-biserial correlation. Formulas are provided for correcting the coefficient either directly or through the mediation of relevant statistics found in studies where the coefficient itself is not reported.…

This paper is concerned with the construction of effect size standard errors in situations where the effect sizes are independent but the data have likely been sampled from non-normal distributions, and possibly for different studies, from different families of non-normal distributions. Asymptotic distribution-free estimators are provided for two…