Hereditability of the two second order intelligence factors gc and gf was studied using the MAVA design in 470 brothers reared together, 94 identical twins reared together, 124 fraternal twins reared together, and 1543 boys (fluid intelligence) and 2579 (crystallized intelligence) unrelated. All were in the 12-18 age range. (Author)

The choice between experimental research or process-oriented oriented research as the only valid paradigm of evaluation research is rejected. It is argued that there is a middle ground. Suggestions are made for mixing the two approaches to suit particular research settings. (Author/GK)

Three difficulties have characterized educational research and development in the United States during much of this century: (1) unrealistic demands on the educational system; (2) inappropriate methodologies; and (3) selection of insignificant topics. (MM)

The computer program WEIGAN makes the weighted G analysis available for computer users. The input and output of the program are described. (Author/JKS)

Repeated measures designs often involve dichotomization of a continuous variable in order to be amenable to the analysis of variance nature of such designs. An alternative to that approach wherein the independent variable is kept continuous is presented. (JKS)

The paper describes the small sample stability of least square estimates of variance components within the context of generalizability theory. Monte Carlo methods are used to generate data conforming to some selected multifacet generalizability designs to illustrate the sampling behavior of variance component estimates. (Author/CTM)

The concerns of this investigation are multiple sources of complications in the analysis of multilevel educational data. Selected multilevel methods provide some indication of misspecification and can identify the direction of the bias in estimating teacher/class effects on mean class outcomes. (Author/CTM)

A review of research suggests that support for team teaching is not based on empirical evidence. Intensive, systematic investigations are needed before the effectiveness or ineffectiveness of team teaching can be substantiated. (MV)

The case study of a 12-year-old girl referred for severe behavioral problems illustrated how attention to baseline measures prevented premature conclusions regarding the impact of a conditioning procedure upon aggresive, acting-out behavior. (Author/SBH)

Critiques the "Child Development" special issue on poverty. Argues that the issue understated the variation observed within social class groups and that a confounding of genetic and environmental effects in biological families weakens the case for environmental effects as presented. Concludes that behavior genetic research designs are…

Offers reactions to critiques of a proposed research model: consensual qualitative research (CQR). Clarifies the meaning of consensus, explicates the representativeness of samples, analyzes the limitations and advantages of self-report data, and explores the nature of truth. Explores theory and verification in CQR and compares CQR to other…

Describes the following three forms of direct researcher-practitioner cooperation: data-extraction agreements; clinical partnerships; and colearning agreements. Each form's distinctions are highlighted illustrating how, unavoidably, educational research projects are social interventions in the lives of project participants. (GR)

Too many practitioners interpret ABAB research based on visual inspection rather than statistical analysis. Based on an experiment using cooperative learning to mainstream autistic students, hypothetical data for one student from an ABAB reversal design are used to illustrate the techniques and importance of regression analyses. Discussion focuses…

Examines statistics and research design requirements at various levels of school psychology education in the United States. Results indicated more required courses in statistics and research design at the doctoral level. Results are discussed in terms of the importance of statistics and research design competency at all levels of the profession.…