Since meta-analysis was described in 1976 (Glass) as the application of familiar experimental methods to the integration of available research, at least five coherent approaches to meta-analysis have appeared in common use. These approaches can be divided into two broad groups. In the first group (including procedures by Robert Rosenthal, Larry…

A meta-analysis was conducted on 44 educational studies that used either a (labelled) Hawthorne control group, a manipulation of Hawthorne effects, or a group designed to control for the Hawthorne effect. The sample included published journal articles, ERIC documents or unpublished papers, and dissertations. The studies were coded on 20 variables,…

A meta-analysis including 96 experimental studies considers the effects of reinforcement/reward on intrinsic motivation. Results indicate that reward does not decrease intrinsic motivation, although interaction effects must be examined. An analysis with five studies also indicates that reinforcement does not harm intrinsic motivation. (SLD)

A framework and concepts for developing inclusion criteria for meta-analysis are presented and illustrated in a meta-analysis of primary studies in patient education for preventive health services. Of 5,451 citations located and abstracts screened, 64 studies eventually met acceptability criteria. (SLD)

When the editors of The Voice of Evidence in Reading Research, Ms. McCardle and Ms. Chhabra, decided to edit a book and to invite authors to contribute to it, they wanted it to be a book for teachers. As stated in the first chapter, their motivation was to empower teachers to judge research worthiness for themselves. They feel that it is important…

A prominent feature of behavior-analytic research has been the use of single-subject designs. We examined sport psychology journals and behavioral journals published during the past 30 years, and located 40 studies using single-subject designs to assess interventions for enhancing the performance of athletes and coaches. In this paper, we…

The purpose of the present study is twofold: (a) to compare the validation of percentage of nonoverlapping data approach and percentage of data points exceeding the median of baseline phase (PEM) approach, and (b) to demonstrate application of the PEM approach in conducting a quantitative synthesis of single-subject research investigating the…

Given that theory is a crucial component of path analysis and that major theories in the social sciences either directly or by inference assume interaction, it appears that interaction has to be considered in path analytic models that reflect those theories. The use of interaction within the framework of path analytic methodology is investigated…

A general model is described which can be used to represent the four common types of meta-analysis: (1) estimation of effect size by combining study outcomes; (2) estimation of effect size by contrasting study outcomes; (3) estimation of statistical significance by combining study outcomes; and (4) estimation of statistical significance by…

Speculates about the outcomes of person-environment research and suggests how more successful research might be planned. Focuses on congruence effects and the value of meta-analysis. Suggests careful use of theory; attention to both environmental and personal assessment; identification of potent personal, environmental, and theoretical variables;…

Focuses on alternative paradigms to experimental inquiry useful to instructional systems researchers, including quasi-experimentation, meta-analysis, case study and ethnography, systems-based evaluation, and technique and model development. Each is discussed in terms of how it generally applies in the field and how it has been employed by…

A meta-analytic study on effectiveness of behavioral and psychotherapeutic treatments for challenging behaviors in individuals with mild mental retardation is reported. Eighty articles were examined. For each comparison, several study variables and two effect sizes (percentage of nonoverlapping data--PND and percentage of zero data--PZD) were…

The widespread problem of substance abuse negatively affects users and their families. This paper provides a methodological review of empirical studies that focused on systemic interventions (particularly marital and family therapy) in the treatment of substance abuse. The articles examined here focused on engaging the addict in treatment,…

The purpose of this study was to determine the types of research methods used to study cognitive processing development in gifted learners, from 1975-1986. Of 870 research publications identified on giftedness, 522 publications (60 percent) dealt with cognitive processing development. Research designs used most frequently were causal-comparative,…

Since about 1962, researchers have explored the effectiveness of educational software in the schools under various conditions, and many have concluded that computer assisted instruction (CAI) is effective. Many of the studies reviewed to support this conclusion, however, had design flaws. Reviews of educational software effectiveness studies have…