Failure to consider errors of measurement when using partial correlation or analysis of covariance techniques can result in erroneous conclusions. Certain aspects of this problem are discussed and particular attention is given to issues raised in a recent article by Brewar, Campbell, and Crano. (Author)

The technique of factor analysis was used to explore the structure of five batteries of readiness tests (Gates Reading Readiness Test, Developmental Tests of Visual Perception, Metropolitan Readiness Tests, Specially Constructed Readiness Test by Olson, and Wechsler Intelligence for Children) as predictor variables for the Stanford Achievement…

The Class Activities Questionnaire (CAQ) was used to compare a Canadian high school participating in a research project employing an information retrieval system with another not involved in the project. This paper evaluates the validity of the CAQ as a measurement instrument for this study. The CAQ was administered to 1831 students, 806 Science…

Rationally defined outcome variables, for use in evaluating youth-work training programs, were incorporated in questionnaires administered to present and former Neighborhood Youth Corp enrollees and analyzed to determine their suitability as criterion measures. Using a factor analytic technique, empirically defined clusters were obtained for…

First grade students stratified on the basis of their racial-ethnic and socioeconomic status (SES) were studied to determine factors measured by several readiness (aptitude) tests and to learn whether these factors differed for the children from the various groups. SES was determined by father's occupation, or if absent, mother's occupation; the…

Statistical procedures are presented for determining ordinal and disordinal aptitude-treatment interactions with linear and curvilinear data. The paper presents a method for testing the homogeneity of group regressions for a single aptitude and provides models for expanding this test to linear and curvilinear regression planes. Procedures are…

The nature of the relations between traditional psychometric and Piagetian instruments is analyzed, in order to provide information relevant to the question of which type of test or combination of them will provide the most useful information to those seeking to construct and maintain optimal learning environments. Four hypotheses are posed: (1)…

A computerized content analysis of the "theory input" for a basic speech course was conducted. The questions to be answered were (1) What does the inexperienced basic speech student hold as a conceptual perspective of the "speech to inform" prior to his being subjected to a college speech class? and (2) How does that…

This document summarizes the authors ideas and ideas which were communicated during his meetings with various members of various national and international organizations. The purpose of these conversations was to study and evaluate the importance of the human factor which has determined the success of a demonstration farm at Vientiane and to…

An exploratory study of a prison community is presented. The study employed a three-phase design: (1) a pre-survey of the prison community, (2) limited intervention, based on findings of the pre-survey, and (3) a post-survey to determine effects of intervention and to validate findings of the pre-survey for which no intervention had been designed.…

The objective of the study was "to determine how the elementary school child evaluates his school environment through a comparison of the school as he sees it with how professional education intends it to be." The "Keys to Elementary School Environment," an instrument designed to measure the environmental press as perceived by elementary school…

The present study was designed to (1) investigate the changes in the structure and organization of mental abilities during childhood and adolescence of 514 students as sampled by the Wechsler Intelligence Scale for Children (5 to 15 years) and the Wechsler Adult Intelligence Scale (16 to 18 Years) and (2) interpret, and possibly modify, the…

This document is an English-language abstract (approximately 1,500 words) of a report on an investigation started in 1957 by Martti Takala and Penti Pitkanen at the University of Jyvaskyla, Finland, to examine the connections between physical fitness and other measures of individual difference. The report deals with the structure and development…

Differences among day care environments and factors related to these differences are examined. Also, the probable effectiveness of group day care in meeting the developmental needs of children is discussed. Chapters I and II give the rationale and procedures of the study. Chapter III provides a description of patterns of teacher behavior and…

This paper concerns two features of a project on the assessment of job potential: the J-Coefficient, and the J-Scale. The J-Coefficient is a means of determining the validity of a test for a position on the basis of (1) the Beta Weights for predicting test scores from a set of elements and (2) estimates of importance of each element in the…