Visual display of reported impacts is a valuable aid to both reviewers and readers of systematic reviews. Forest plots are routinely prepared to report standardised effect sizes, but where standardised effect sizes are not available for all included studies a forest plot may misrepresent the available evidence. Tabulated data summaries to…

Since research conclusions derived from inappropriate statistical methodologies can lack accuracy, the article describes a technique appropriate to the heterogeneity of special needs groups in which subjects are assigned to fairly homogeneous subgroups. The technique is related to research in reading with this population. (DB)

This study examines the relationship between high-stakes school accountability and its effects upon student test scores and school policies. The authors seek to understand the extent to which accountability sanctions and incentives for the poorest-performing schools in Florida explain subsequent changes in school practices and policies as well as…

Two computer programs (one batch, one interactive) are designed to provide statistics for a weighted linear combination of several component variables. Both programs provide mean, variance, standard deviation, and a validity coefficient. (Author/JKS)

The trend towards using screening programs to facilitate early identification of developmental or learning problems has accentuated the need to establish reliable and valid screening procedures. Researchers in this area must recognize that the dichotomous decision-making function of screening (i.e., to refer or not refer a child for further…

Intended for employers concerned about problem solving and communication within their organization, this document outlines a strategy for developing an instrument that would provide objective data rather than impressionistic data. A questionnaire was designed to explore the relationship between the central constructs of problem solving and…

This paper argues that to be appropriate the evaluation of teaching must occur under circumstances entirely free of the limitations which inferential statistics necessarily impose on teaching. Regardless of whether the statistical, design, and treatment assumptions required for the valid use of inferential statistics in education are met,…

Bayesian estimation procedures are summarized and numerically illustrated by means of simulation methods. Procedures of data generation for simulation purposes are also delineated and computationally demonstrated. The logistic model basic to the Bayesian estimation procedures is shown to be explicit with respect to the probability distribution…

This study further develops the Diagnostic Survey for Leadership Improvement (DSLI) and determines its reliability and validity. Split-half estimates of the DSLI's reliability were computed. These estimates came in terms of the Pearson product-moment correlation coefficients that were then corrected by the Spearman-Brown Prophesy Formula. The…

Information reporting at traditionally black colleges and universities was reviewed, based on the Higher Education General Information Survey (HEGIS) files for 36 institutions. The objective was to determine the quality of the data submitted by seven of these institutions, and to suggest actions for improving the quality of the HEGIS information…