Student self-assessment is a central component of current conceptions of formative and classroom assessment. The research on self-assessment has focused on its efficacy in promoting both academic achievement and self-regulated learning, with little concern for issues of validity. Because reliability of testing is considered a sine qua non for the…

In experimental research, internal validity refers to what extent researchers can conclude that changes in dependent variable (i.e. outcome) are caused by manipulations in independent variable. The causal inference permits researchers to meaningfully interpret research results. This article discusses (a) internal validity threats in social and…

The lack of a unified definition of giftedness leads researchers to use very different operationalizations when selecting a sample of gifted individuals for use in research. We found 104 empirical articles from 38 journals that differentiated between gifted and nongifted students which were analyzed to determine the most common methods of…

This review examines a research study that compares high school graduation rates of students who used vouchers to attend private high schools in Milwaukee and students who attended public high schools in that same city. The study reports that for the most recent year of data, a sample of voucher students had estimated graduation rates 12…

Monte Carlo validation studies of clustering algorithms, including Ward's minimum variance hierarchical method, are reviewed. Caution concerning the uncritical selection of Ward's method for recovering cluster structure is advised. Alternative explanations for differential recovery performance are explored and recommendations are made for future…

Some of the frustrations inherent in trying to incorporate qualifications of statistical results into meta-analysis are reviewed, and some solutions are proposed to prevent the loss of information in meta-analytic reports. The validity of a meta-analysis depends on several factors, including the: thoroughness of the literature search; selection of…

The purpose of this study was to investigate the methodology of empirical counseling supervision articles published from 1981 to 1987. Seventy-five studies met the criteria for inclusion. Fifty-five articles included adequate information about at least one inferential statistical test to permit computing eta(sup 2), epsilon(sup 2), power, and…

Educational researchers have claimed that the quantitative and qualitative approaches to educational inquiry are, indeed, compatible. However, it would be unfortunate to discontinue this debate. The quantitative-qualitative debate began with the interpretive approach to social inquiry. Dilthey argued that since cultural/moral sciences differ from…

Reviews previous studies that used the Internet for survey research, discusses new methodological issues and problems, and presents a case study that seeks possible solutions. Topics include biased samples and biased returns, access to the Internet, effect of self-selection, validity of respondents, Web browsers, authentication, log files, and…

The use of cognitively oriented models in research in reading comprehension requires the examination of the task demand characteristics of the research. Those cognitive processes involved in the performance which are due to the experimental procedures must be separated from those which operate in normal circumstances. "Control…

The purpose of this review is to determine the scientific status of the proposition that viewing television in general or viewing "Sesame Street" in particular affects children's attentional skills, abilities, or behaviors. It has been frequently claimed that television viewing negatively affects children's attentional abilities. The…

Learning of subject matter and acquisition of academically relevant skills are important goals in enhancing academic achievement in the classroom. The results of 22 experiments reviewed in this article support the validity of the academic performance targets but not classroom behavior targets. Some limitations on these conclusions are discussed.…

A survey of speech communication departments and a review of the literature indicate that most speech communication researchers continue to use college students as their primary source of subjects. The problem of sampling is discussed and methods for dealing with generality are offered. (PD)

A model is described which illustrates two general uses of multiple analyses to evaluate quasi-experiments: obtaining estimates of the treatment effect, and checking the validity of the experiment. (MH)

A new report published by the Buckeye Institute for Public Policy Solutions is a minor variant on six similar reports published by the Friedman Foundation over the past three years. The new report repeats some of the errors in the previous reports, and it follows a parallel structure, arguing that the costs of dropping out are dramatic for the…