This study investigated differences between WISC Full Scale IQs obtained on mentally retarded adolescents during their fifteenth year of age and WAIS Full Scale IQs obtained after their sixteenth birthday using both the eleven subtest WAIS and several abbreviated forms of the WAIS. (Editor)

25 nine year old children from the Outer Islands of Orkney were compared with a matched group of 25 children from Kirkwall in order to find out whether any differences existed in the development of geographical and spatial concepts as well as country and nationality. (Editor/RK)

The purpose of this study was to help determine optimum item sampling plans for use in school evaluation projects. (Author)

The problem of demonstrating replicability of factor structure across random variables is addressed. Procedures are outlined which combine the use of random subsample replication strategies with the correlations between factor score estimates across replicate pairs to generate a coefficient of replicability and confidence intervals associated with…

TO STUDY THE EXACT DISTRIBUTIONAL DIFFERENCES BETWEEN SMALL, RELATED-SAMPLE PERCENTAGES AND THE ACCURACY OF LARGE-SAMPLE TESTS, SOME SIX HUNDRED SAMPLING DISTRIBUTIONS WERE CONSTRUCTED BY RANDOMIZATION. EXACT PROBABILITY FIGURES IN THE .204-.005 RANGE WERE TABULATED. THE TABLE OF SIGNIFICANCE VALUES EXTENDS TO SAMPLES YIELDING MATRICES VARYING IN…

In 1966, the Research Department of the California Teachers Association sent a questionnaire to a stratified random sample of California teachers. Of 2,400 questionnaires distributed, there were 2,061 (85.9 percent) usable returns. The questionnaire asked about the professional status of the teacher and his professional judgments regarding teacher…

Standard errors of pooled mean estimate in multiple matrix sampling were compared for two procedures. The data were from tests involving items with and without replacement. The two procedures involve the formulations of Madow and Lord, and Novick; the former permits sampling of item, with or without replacement, whereas the latter is to be used…

Researchers often use the analysis of variance to test hypotheses about the means, followed by a multiple comparison technique when the F-test is significant. The technique is this study was developed by Newman (1939) and Keuls (1952). A flaw in the rationale underlying this technique was evaluated to determine whether the flaw is sufficiently…

The experience of the American Council on Education's Cooperative Institutional Research Program indicates that large-scale national surveys in the domain of higher education can be performed with scientific integrity within the constraints of costs, logistics, and technical resources. The purposes of this report are to provide complete and…

Four nonparametric alternatives to the parametric Bartlett test are presented for handling the K-sample equality of variance problem. The two sample Siegel-Tukey Test, Mood Coefficient of Alienation Test, and Klotz Test are extended to the multisample situation by the methods of Puri. A fourth alternative involving a Q-statistic procedure…

The purpose of this paper is to prove that one currently recommended method of obtaining the reliability of an instrument defined on a population of aggregate units is invalid. This method randomly splits the aggregate into two halves, correlates the two half unit scores by a Pearson product moment correlation coefficient, and corrects the…

The use of readability principles in the ERIC guidelines for abstracting suggests that abstracts should be more readable than source documents. However, information theory suggests that the compression of information would result in less readable abstracts. Abstracts and their source documents were selected randomly from each of four…

Behavioral scientists often wish to determine if a sample has been taken from a symmetric population. Similarly, classroom teachers are interested in symmetry if they wish to grade on a "curve." Previously, the sign test, the Wilcoxon test and the t-test have been used to test a hypothesis concerning the symmetry of a distribution of…