Five branch libraries measured the quantity of books, sound recordings, and periodicals in their catalogs in comparison with the number available for loan. A sampling method similar to those used for political pools and market research was employed. (JAB)

In negotiating to obtain a sample of records from a computer file, it is important to be able to present a simple program that will produce a representative and valid sample. This article describes two procedures: (1) an interval selection method; and (2) a random numbers file. (JAZ)

Information loss occurs when continuous data are grouped in discrete intervals. After calculating the squared correlation coefficients between continuous data and corresponding grouped data for four population distributions, the effects of population distribution, number of intervals, and interval width on information loss and recovery were…

Large sample univariate methods are presented. These methods compare effect sizes within a single study between independent groups of different subjects on a single dependent measurement and independent groups that are assessed on the same dependent variable while using a different test. (TJH)

Computer sampling from a multivariate normal spherical population was used to evaluate Type I error rates for a test of P = I based on Fisher's tanh(sup minus 1) variance stabilizing transformation of the correlation coefficient. (Author/TJH)

A small data set is used to show that correlations and standard deviations measured within an explicitly selected group need not be smaller than those within an applicant population. Both validity and reliability estimates within a selected group can exceed those within an applicant population. (Author/LMO)

This framework will define the purpose and scope of NAEP's system of collecting background information, including background questionnaires and other sources of non-cognitive data. It will establish criteria for reporting background information as part of the National Assessment. The approach it suggests provides for asking various groups of…

This study examined the reliability of three methods for detecting differential item functioning (DIF) (i.e., the Mantel-Haenszel method, the standardization method, and the logistic regression method) applied to achievement test data. In addition, the study examined the influences of different sources of error variance, including examinee,…

The literature on measurement reliability shows the consensus that group heterogeneity with regard to the trait being measured is a factor that affects the sample measurement reliability, but the degree of such effect is not entirely clear. Sample performance also has the potential to affect measurement reliability because of its effect on the…

The major purpose of this investigation was to assess the concurrent validity of the French Pictorial Test of Intelligence with the Stanford-Binet Intelligence Scale, Form L-M in a moderate to severly physically disabled sample of children. (Author)

The aim of the inquiry was to assess the validity of the claim that divergent thinking instruments should be administered under relaxed conditions for optimum performance. (Author)

The purpose of the current research has been to establish the factorial validity and reliability of the Work Components Study in the public school system. (Author/RK)

A simple means of estimating patron use is described. Over a year's time about 100 observations were obtained which were extrapolated to produce estimates of library use by hour, day of week, month, and university term. (Author)

The purposes of this study were to determine which of the tests, PPVT, SIT, or Lorge-Thorndike (LT), may be the most useful to the classroom teacher in predicting reading achievement, for use in reading expectancy formulas, and for analyzing I.Q. scores obtained on different tests. (Author/RK)