Good quantitative evidence does not require large, aggregate group designs. The authors describe ground-breaking work in managing the conceptual and practical demands in developing meta-analytic strategies for single subject designs in an effort to add to evidence-based practice. (Contains 2 figures.)

This article proposes that a complete account of cognitive evolution may have to accommodate a domain-general source of variance in mental abilities accounting for differences among primate taxa. Deaner, van Schaik, and Johnson [Deaner, R.O., van Schaik, C.P. and Johnson, V.E. (2006). Do some taxa have better domain-general cognition than others?…

This article presents the discussion between John Gravois and John B. Lee concerning the problems in measuring bias. John B. Lee is president and founder of JBL Associates, Inc., a prominent higher-education-research firm. He is retained by the American Federation of Teachers to assess the research that purports to find a liberal predominance and…

This meta-analysis synthesizes experimental and quasi-experimental research on instruction that enhances the mathematics performance of K-12 students with learning disabilities. It reports the findings from this synthesis, discusses the implications for practice, and suggests next steps for research and professional development efforts in this…

Technical terms such as "meta-analysis," research synthesis," and "effect size" may sound alien to practitioners in the field of education. Due to limited knowledge on meta-analysis among educators, the results of meta-analyses seldom translate from research to classroom practice--even though meta-analyses may provide valuable information on how…

Meta-analyses are presented of sex differences in (1) the (mental) arithmetic subtest of the Wechsler intelligence tests for children and adolescents (the WISC and WPPSI tests), showing that boys obtained a mean advantage of 0.11d; (2) the (mental) arithmetic subtest of the Wechsler intelligence tests for adults (the WAIS tests) showing a mean…

Cognition in schizophrenia seems to be characterized by impaired performance on most tests of explicit or declarative learning contrasting with relatively intact performance on most tests of implicit or procedural learning. At the same time there have been conflicting results for studies that have used the Serial Reaction Time (SRT) task to…

The article presents a thematic review of the recent research on workplace learning. It is divided into two main sections. The first section asks what we know about learning at work, and states four propositions: (1) the nature of workplace learning is both different from and similar to school learning; (2) learning in the workplace can be…

De Wolff and van IJzendoorn's meta-analysis supported the relation of parental behavior to attachment security; however, they concluded that sensitivity was not the best predictor of attachment security. This secondary analysis of their data re-examined their conclusion and tested moderators of the relation between sensitivity and attachment, such…

This meta-analytic review of 148 studies on child and adolescent direct and indirect aggression examined the magnitude of gender differences, intercorrelations between forms, and associations with maladjustment. Results confirmed prior findings of gender differences (favoring boys) in direct aggression and trivial gender differences in indirect…

Suicide behavior is a serious clinical problem worldwide, and understanding ways of reducing it is a priority. A systematic review and meta-analysis were carried out to investigate whether Cognitive-behavioral therapies (CBTs) would reduce suicide behavior. From 123 potential articles, 28 studies met the entry criteria. Overall, there was a highly…

Research concerning distress in couples coping with cancer was integrated using meta-analysis and narrative critical appraisal. Individual levels of distress were determined more by gender than by the role of being the person with cancer versus that person's partner. That is, women reported consistently more distress than men regardless of their…

Rosenthal and Rubin introduced a general effect size index, r[subscript equivalent], for use in meta-analyses of two-group experiments; it employs p values from reports of the original studies to determine an equivalent t test and the corresponding point-biserial correlation coefficient. The present investigation used Monte Carlo-simulated…

The emergence of the European Standards and Guidelines (ESG) for Quality Assurance has been seen as an important step towards realising the European Higher Education Area by creating more transparency and accountability in the area of quality assurance. The ESG also include standards as to how quality assurance agencies should be reviewed. In a…

Meta-analysis procedures were employed to synthesize findings of research for improving reading comprehension of students with learning disabilities published in the decade following previous meta-analytic investigations. Forty studies, published between 1995 and 2006, were identified and coded. Nearly 2,000 students served as participants.…