Statistical analysis of many studies on Piaget's stage 4 object concept attempts to synthesize available quantitative data. Factors of this "meta-analysis" include: (1) effects of age; (2) number of A trials; (3) length of delay between hiding and search; (4) number of locations; and (5) visual properties of hiding arrays. Includes…

S. Jackson and S. Jacobs' article entitled "Generalizing about Messages" represents an important methodological innovation in communication research. The article urges procedural change by recommending the use of multiple-message designs because of a weakness in single-message designs; it recommends analyzing message-replication data…

Presents meta-analysis evidence of the association between paternal sensitivity and infant-father attachment from eight studies with 546 families (combined effect size r = 0.13). A meta-analysis of 950 families from 14 studies found an overall correlation of 0.17 between infant-mother and infant-father attachment. Presents a data-based model of…

Argues that there are two central reasons for concern about the adequacy of M. Allen's metanalysis of the research literature concerning the relative persuasive effectiveness of one-sided and two-sided messages: (1) the classification of the message types in a number of studies is questionable; and (2) the literature search underlying the review…

The article critiques a 1987 (Kavale and Forness) meta-analysis which concluded that research does not support modality-based instruction. The study is faulted for its selection criteria as well as its failure to consider demographic differences, achievement level differences, multiplicity of preferences, definitions of terms, effect-size…

This response to Dunn (EC 221 793) reaffirms the conclusions of a meta analysis on modality-based instruction, through elaboration of the study's selection criteria and methodological factors. Although modality-based instruction is seen to be intuitively appealing, educators are encouraged, instead, to apply instructional methods of proven…

The adequacy of traditional effect size measures for research synthesis is challenged. Analogues to analysis of variance and multiple regression analysis for effect sizes are presented. The importance of tests for the consistency of effect sizes in interpreting results, and problems in obtaining well-specified models for meta-analysis are…

Examines the relationship between teaching and research. Considers whether an emphasis on one or the other better serves the interests of communications departments. Adumbrates arguments suggesting that research undermines teaching and those suggesting the converse. Shares the results of a meta-analysis of existing research on the topic. Finds a…

The recent releases of two major international comparative studies that addressed mathematics--the Trends in International Mathematics and Science Study 2003 (TIMSS 2003) and the Program for International Student Assessment 2003 (PISA 2003)--provide opportunities and challenges for mathematics education researchers interested in using the…

This paper examines studies of the Minnesota Institute which were interpreted as demonstrating that students with learning disabilities are not distinguishable from other low-achieving students. Results of the reexamination indicate that learning disabilities and low achievement can be clearly differentiated, even in studies indicating that little…

Examines the effects of time restriction on social interaction in computer-mediated communication through a meta-analysis of applicable research. Derives hypotheses from Joseph Walther's social information processing perspective. Supports these hypotheses on social communication. (HB)

Addresses the implicit assumption that instructional media represent meaningful experimental variables independent of instructional content or strategy. Results of computer-based instruction (CBI) studies (both well-designed and flawed) and meta-analyses are reviewed to support the authors' position that this assumption is invalid, and new…

Computer-based instruction (CBI) studies analyzed by Kulik et al. were examined to explore the validity of competing claims about the computer's contribution to measured achievement gains. Results suggest achievement gains found in CBI studies are overestimated and are due to uncontrolled but robust instructional methods embedded in CBI…