Responds to previous article (Thomas, 1990) by discussing principles of research validity and research design. Concludes that humanistic values must be maintained during the quest for knowledge and professional status. Sees ultimate goal of all endeavors of rehabilitation researchers, educators, and professionals to be promotion of welfare of…

Discusses issues to consider when investigating behavioral effect of foods, including idiosyncratic response to particular food, necessity of identifying individual sensitive to food being studied, necessity of including washout phase, consideration of withdrawal effects, assessment of change, dietary challenge, and time parameter necessary for…

Discusses two areas for improving consultation research: defining "boundary" conditions for consultation and analogue research and expanding measures used to evaluate consultation outcome research. Defines consultation as egalitarian relationship between consultant and consultee focusing on problem of third party client and resulting in…

To predict suicide, explicit causal models of suicide outcome are needed in which predictors are temporally ordered and then tested statistically. Because suicide is a dichotomous, nominal scale outcome, only certain statistics for prediction are appropriate. Logistic regression, which utilizes the likelihood ratio test of statistical inference,…

Comparison of six procedures to test for location equality among two or more groups when population variances are heterogeneous suggests that, when the variance homogeneity and normality assumptions are not satisfied, and the design is unbalanced, the use of any of these test statistics with the usual least squares estimators is not recommended.…

Describes qualitative techniques and their use in industrial and vocational psychology for theory generation, elaboration, and testing. Discusses research design, data analysis, and best practices using qualitative methods. Contains 54 references. (SK)

Provides an introduction to this special issue. Summarizes the process of topic selection, article format, and topic sequence. (GCP)

Argues that Weinrach et al. (1998) made unwarranted claims about the number of psychologists publishing in the "Journal of Counseling and Development" during 1978 to 1993 as well as their membership in the American Counseling Association. Discusses methodological and conceptual problems with the Weinrach et al. article and discusses the…

Drawing on papers by the statistician Robert Matthews, this article questions the standard formula for tests of significance used to validate research results, returning instead to the theorem proposed by Thomas Bayes in the eighteenth century, which starts with a subjective assessment of plausibility. (Author/DB)

Describes many-facet Rasch analysis, which provides a basis for making fair and meaningful decisions from individual ratings by judges. Gives examples of crossed, nested, and mixed designs to illustrate how a Rasch analysis may be modified to meet the connectivity requirement for comparing facet measures. (SLD)

Studied the analytic problems associated with a design in which one identifiable group is allocated to each treatment condition and members of these groups are measured to assess the intervention. Results from a simulation study underscore the analytic problems associated with these quasi-experimental or group-randomized designs. (SLD)

This meta-analysis examines the effectiveness of functional mathematics instruction, specifically purchasing skill instruction, for individuals with disabilities. Twenty-eight intervention studies were identified and reviewed. Because all studies employed single-subject research designs, a nonparametric procedure, the percentage of nonoverlapping…

A description of the three fundamental elements of a good research story- the theoretical framework, the methodological framework and the guiding research questions- is given and the process by which the choice of theoretical framework is made is examined.

The ESRC Teaching and Learning Research Programme is expected to produce knowledge of high social scientific quality and practical pedagogic value. It faces, in a particularly acute form, the issue of how confidence in its conclusions can be built. This article begins with some conceptual clarification of the notion of a 'warrant' for research…

This study examined cognitive processing speed through four modalities (auditory-verbal, visual-verbal, visual, and visual-visual) at the end of Grade 1 and how it influences reading and spelling. The subjects were 124 French-speaking children, selected for their contrasting performance on reading and spelling tasks. The children in the first…