An investigation was made of influence in 77 academic departments of 11 community colleges in Maryland. The purposes of the investigation were to examine the relationship of perceived measures of influence to member attitudes of (a) policy agreement, (b) superior-subordinate relations, (c) peer relations; to examine the aslopes of the distribution…

Five-hundred dichotomously scored response patterns were generated with sequentially independent (SI) items and 500 with dependent (SD) items for each of thirty-six combinations of sampling parameters (i.e., three test lengths, three sample sizes, and four item difficulty distributions). KR-20, KR-21, and Split-Half (S-H) reliabilities were…

The validity of the Dale-Chall Readability ratings for sixth-grade science textbooks when compared to an independent criterion of language difficulty expressed in cloze units was examined. The Canadian Lorge-Thorndike IQ Test and the Canadian Test of Basic Skills, Vocabulary and Comprehension subtests, were administered to 366 sixth graders. Mean…

The accuracy of estimating test means for groups of twelfth-grade students by the item-sampling technique was examined. The subjects were from 35 twelfth-grade schools participating in the National Longitudinal Study of Mathematical Abilities. Half of the students in each school were assigned to a treatment condition where they took a complete…

This paper, a revision of the original document, "Correcting Partial, Multiple, and Canonical Correlations for Attenuation" (see TM 000 535), presents the formula for correcting coefficients of partial correlation for attenuation due to errors of measurement. In addition, the correction for attenuation formulas for multiple and cannonical…

Advocates of movie making believe that it provides a non-ethnocentric experience that is inherently engaging and relatively free from the risk of failure. Disadvantaged teenage boys who were attending two experimental summer work camps participated in studies of two aspects of movie making. The first study evaluated three different techniques for…

The correction for attenuation formulas for partial, multiple, and canonical correlation coefficients are discussed and the effects of measurement errors on these statistics are explored. The notation is standardized and the derivation extended where appropriate. It is shown that as the reliabilities of the predictors become more disparate, the…

In this paper problems caused by the existence of errors of measurement are identified for factor analysis, regression analysis, ANOVA, and ANCOVA. At least one detrimental effect is shown to exist for each type of analysis. When a researcher's interest is with infallible variables, he runs the risk of biased results from all of the procedures…

The problem of the comparability of change scores is investigated. Change quotients and residual change scores are evaluated as alternative approaches and methods for estimating the true change and true score residual, the reliability of change scores and residuals, and procedures for constructing confidence intervals for residuals are explored.…

The interpretation of test profiles, graphic devices which indicate the overall performance of an individual or group of individuals, is discussed. Some uses of profiles are presented, together with a three step profile analysis procedure for interpreting test results. Because profiles are relatively simple to construct and appear to be easily…

The correlation coefficients between the new basic interest scales and the traditional empirical (occupational and nonoccupational) scales on the Strong Vocational Interest Blank for Men were determined for a diverse sample of 155 males. In most cases, the relationships were logical and easy to understand. In some cases, however, the relationships…

A study is presented which attempts to investigate the interrelationships between certain assumptions about the nature of people held by the county extension leader, his sources of job satisfaction and dissatisfaction, and his performance of his function of leading the county staff. Data was collected by means of a questionnaire from 81 county…

This report was prepared by the Careers and Curricula Program, which is a career development and guidance program sponsored by The Center for Social Organization of Schools. As one of five Center programs which develop scientific knowledge of the schools' effects upon students and utilize this information to improve educational practices, this…

We are concerned with the hypothesis that two variables have a perfect disattenuated correlation, hence measure the same trait except for errors of measurement. This hypothesis is equivalent to saying, within the adopted model, that true scores of two psychological tests satisfy a linear relation. A statistical test of this hypothesis is derived…

The purpose of this paper is to suggest a technique of cluster analysis which is similar in aim to the Interactive Intercolumnar Correlation Analysis (IICA), though different in detail. Two methods are proposed for extracting a single bipolar factor (a "contrast compenent") directly from the initial similarities matrix. The advantages of this…