Principal components analysis of standardization sample data for the Comprehensive Test of Adaptive Behavior, involving 6,647 persons with mental retardation, found that a single factor accounted for 86 percent of the variance in category scores. Use of the Total Score and idiographic item clusters is psychometrically preferable to use of category…

An analysis of student decisions to withdraw from specific courses before assignment of grades but after the "add-drop" period at the University of Minnesota is presented. In a probit model, withdrawals appear to occur randomly, with notable exceptions. Student, class, and teacher characteristics are considered as variables related to…

When 43 experienced school psychologists were asked to evaluate discrepancy scores, it was found that they made inconsistent choices, failed to use standard statistical procedures for testing differences between scores, and tended to misinterpret percentile ranks as useful for discrepancy analysis. Implications for learning-disabilities…

The methodological issue of qualitative versus quantitative research is addressed, and the argumentation of research using interview methods for research is explored. Warrants of the type that are used in arguments generating conclusions from interview data are included. (KR)

This content analysis study evaluated the research methods and statistical techniques employed in studies reported in the professional journal, "TECSE" (Topics in Early Childhood Special Education) between 1990 and 1993. Research articles comprised 37 percent of all articles (n=120) published during this period. The most frequently…

Based on the premise that multimethod approaches that integrate quantitative and qualitative research methods are best suited to contextual studies of media audiences, two studies of mass media use and meaning were conducted with college undergraduates. Research grew out of a classroom assignment wherein students avoided all media products (films,…

The purpose of this study was to determine the effect of different practice conditions upon technical accuracy and musicality of student instrumental performance. High school instrumental students attending summer music camps at the Florida State University were randomly assigned to one of three different practice groups: (a) teacher-designed…

Socioeconomic data are presented for the Black population from the 1980 census for the United States as a whole, for regions, divisions, states, selected counties, and places. Data are shown for counties and places with 50,000 or more Blacks, places of 1,000 or more total population with a Black population of 50 percent or more, and all counties…

The purpose of this research is to demonstrate that a systematic approach to the graphical analysis of Rasch model residuals can lead to an increased understanding of ordered response data, and that residual patterns do change in predictable ways, and that summary statistics need not be the only piece of evidence for assuring the fit between model…

Item analysis procedures appropriate for domain-referenced classroom testing are described. A conceptual framework within which item statistics can be considered and promising statistics in light of this framework are presented. The sampling fluctuations of the more promising item statistics for sample sizes comparable to the typical classroom…

This report describes a procedure that promises to improve the stability, accuracy, and efficiency of the employment of latent trait models and an application of the procedure to the Rasch model. Data were collected from the Portland Public Schools Level Tests administered to 25,740 students. Since each of the 173 items (chosen from the total…

Median test scores on the Comprehensive Tests of Basic Skills (CTBS) for many District of Columbia public schools declined substantially in 1990, although this decline was not evident in reports from school officials. These declines occurred at elementary, junior high, and senior high school levels, in grades 6, 9, and 11, respectively. They also…

The rediscovery of qualitative research in education in the 1970s has fanned the debate among proponents of both qualitative and quantitative traditions. This paper demonstrates implications of each research tradition for educational policymaking. Grounded in finding solutions to practical problems, educational research has had two purposes: to…

The greater organizational complexity of libraries and information centers in recent years has given rise to more complex problems for managers. To facilitate solutions, operations research (OR) techniques have been developed that consider the quantitative dimensions of problems along with their political and organizational aspects. Eight standard…

This report examines the 1984 library and information science literature in order to characterize, analyze, and evaluate the published research of the field. The subjects and methods of research, types of libraries studied, and analytical techniques used are examined; a "core" journal group of 91 sources is established; and the amount…