Formulas for estimating cross-validated hit-rates, the number of correct classifications into an a priori grouping structure, were examined. The following mathematical formulas were compared: McLachlan's formula estimator, two Snappin and Knoke smoothed formula estimators, and the analytic leave-one-out estimator. The R method was included as a…

Three measures of person-fit (the extent to which an examinee's response pattern on a multiple-choice test is consistent with his ability as estimated by total score) were computed for students taking classroom tests under 12 different instructors at a comprehensive university. Supplementary questions on each test inquired concerning students'…

The Classification of Secondary School Courses (CSSC) is a coding activity to translate the diverse course titles which appear on transcripts and master schedules of students into common terms, permitting meaningful comparisons to be made about these students and allowing secondary school coursework to be considered as a coherent factor in…

Two studies were conducted to examine relationships between intransitivity, defined by the total circular triad (TCT) score on the Minnesota Importance Questionnaire (MIQ), and vocational needs and abilities. Data were collected on 373 rehabilitation clients for Study 1 and 215 vocational assessment clients for Study 2. In Study 1, TCT scores were…

This study examines and describes current statistical programs in the field of library and information science, identifies areas of the National Commission's program that are dependent on quantitative data, compares the current statistical programs with projected new needs, and specifies areas that must be developed in a future national…

Most measurements of racial and ethnic segregation, particularly comparative analyses across cities, have relied on the Index of Dissimilarity ("D"). Recently, however, it has been demonstrated that cities with different racial compositions also have different expected values of "D" under a random distribution of whites and…

In recent years there has been a rapid growth in the number of households headed by women and in the proportion of these households receiving public assistance. This paper presents a model to test the hypothesis that changes in the public assistance system contributed to the increase in these households. Current Population Survey data on the…

A fundamental fact of the analysis of variance statistical procedure is that if the omnibus F test of an effect is significant, then there exists at least one contrast of that effect that will be significantly different from zero according to the S-method of Scheffe. The caveat to this rule is that the significant contrast(s) may not be of any…

This study examined partisan elections in large urban school districts in Canada. It investigated the extent to which the existence of political parties in a school board election serves to aggregate the educational attitudes and opinions of candidates. Also, it investigated the extent to wbich political parties aggregate differences in the…

This document provides statistical data concerning the national human resources of scientists and engineers. It presents an integrated overview of current utilization and supply patterns for U.S. scientists and engineers in 1978, continues with a detailed examination of the status of doctoral scientists and engineers, and concludes with an…

This report presents data on the demographic, social, and economic characteristics of Puerto Ricans in the mainland United States and makes comparisons between the social, educational, and economic characteristics of Puerto Ricans and other Hispanic and ethnic groups and the total United States population. All data were taken from reports,…

This volume was prepared for the National Institute on Drug Abuse as part of a Research Issues Series, and summarizes the major research findings in the area of drugs and attitude change which have been published in the last 15 years. The booklet is organized to provide the reader with the purpose, methodology, findings, and conclusions of…

The study involved the use of a structured job analysis instrument called the Position Analysis Questionnaire (PAQ) as the direct basis for the establishment of the job component validity of aptitude tests (that is, a procedure for estimating the aptitude requirements for jobs strictly on the basis of job analysis data). The sample of jobs used…

The general results of this statistical sampling of book readership at a college library revealed that three times as many book readers were reading nonlibrary books as library books inside the library. About one-half of the library books being read are classified as Social Science books. Business Administration majors read books in the library…