The article describes procedures employed for the quantitative synthesis of single-subject research literature in special education. The need for objective, systematic review procedures is noted; previous approaches are reviewed; and the authors' approach (which makes use of overlapping data across phases as an outcome metric) is outlined.…

An evaluation of the "Percentage of Nonoverlapping Data" approach for quantifying outcomes of single-subject research in special education reveals that it is potentially too sensitive to atypical baseline data, not powerful enough to discriminate important treatment differences, and adversely affected by even subtle trends in the data.…

The response to a critique of a proposed method of quantifying outcomes of single-subject research in special education suggests that the alternative procedure proposed has theoretical but not practical merit due to the limited number of observations typically found in single-subject baselines. (Author/DB)

The method of using the percentage of nonoverlapping data points to summarize and synthesize single-subject research in special education was applied to six specific studies. The method was found lacking for such reasons as its failure to identify patterns across time or vital idiosyncrasies in behavior within and across studies. (Author/DB)

The response to a critique of a proposed method of quantitatively synthesizing single subject research in special education reaffirms the authors' view that narrative review procedures are of limited utility without objective standards for evaluating study outcomes. (DB)

The article examines reasons for discrepant findings in two studies of attention differences in learning disabled students, focusing on four interacting factors in experimental research: task, materials, context, and subject characteristics. It is suggested that attentional deficits are not necessarily the underlying problem for all students with…

Based on frequency of citations in the Social Science Citation Index, 33 prominent articles on learning disabilities (1976 to 1985) were compared with randomly selected articles in 16 categories, including funding source, research design, and statistical method. Discussion focuses on characteristics and quality of articles influencing the learning…

This paper provides a rationale for basic research and metatheory development in the field of learning disabilities, outlines the steps and cognitive parameters involved in validating such a metatheory, and discusses integrating the findings of basic research with instructional manipulations and reasons for the poor integration of theory and…

This paper affirms H. Lee Swanson's views in "Toward a Metatheroy of Learning Disabilities" and elaborates upon the role of basic research in learning disabilities. An alternative perspective on the nature of applied research is described that views applied research as theoretically driven research aimed at practical matters. (JDD)

In response to H. Lee Swanson's paper, "Toward a Metatheory of Learning Disabilities," this article argues that the field of learning disabilities does not need to be legitimized and that basic research in learning disabilities is not necessarily the prerequisite vehicle by which theoretical progress can be made. (JDD)

Statistical measures of practical significance report the extent to which variation in the dependent variable can be explained by the independent variable. Reports of special education research sometimes discuss practicality using the estimate of statistical significance. Practical significance, however, may vary greatly among samples even though…

In response to H. Lee Swanson's paper, "Toward a Metatheory of Learning Disabilities," this counterpoint addresses the role of basic versus applied research, limitations of the procedure proposed by Swanson for establishing external validity and proving the metatheory, and limitations of metatheoretical research with regard to developing…

In rebuttal to H. Lee Swanson's paper, "Toward a Metatheory of Learning Disabilities," this article emphasizes that a bias toward applied research in learning disabilities is appropriate, that explanatory theories may not provide control over the phenomena explained, and that the field's orientation toward social consensus rather than…

This response to H. Lee Swanson's paper, "Toward a Metatheory of Learning Disabilities," argues that the field's development from social consensus has positive consequences and that the field is a "prenormal' science. A megatheory is suggested, incorporating metatheoretical aspects of the learning-disabled's information processing…

The original authors address several concerns expressed in four responses to their article: terminology; the need for expert and intensive pedagogy (including early intensive language training); pessimistic attitudes; the need for caution in setting total habilitation as a goal; and a research model. (KM)