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…

The study examined the interrelationships of age, aptitude measures, and training performance scores for 710 men. They ranged in age from 21 to 52 years, but less than 12% were over 40. Most of the men were former military controllers who possessed sufficient prior ATC experience to be selected for training with an exemption from a qualifying…

A detailed description of the Staff Sentiment Scale (SSS) is given. In addition, a brief description of the Conceptual Model, upon which the SSS is based, is given. The model is based on an extensive review of the literature of organizational theory and differentiated staffing and upon systematic observations in schools. It treats Process…

Five possible interpretations are given of very high correlations between scores on successively administered ability tests in a longitudinal sample of approximately 7,000 public school students tested in grades 5, 7, 9, and 11. At each of the four grades, students were given the appropriate level of the Sequential Test of Education Progress…

The grading patterns of teachers at Georgia State University were examined to ascertain the relationship between course discipline fields and grading patterns controlling for teachers' academic and personal attributes. The data base consisted of over 2,000 courses comprising more than 40,000 grades and 1,000 teachers from fall 1975. A methodology…

Adults appear to have different perceptions of a child when rating a child on the Barber Scales of Self-Regard based on correlation coefficients between different sets of adults (parents and teachers). It is the purpose of this study to explore at greater depth the differences between mother and father as to the way they perceive their child. Do…

The Barber Scales of Self-Regard were constructed in such a way as to assess a child's level in a developmental sequence. On each of the seven scales, scale point one describes the least mature level and scale point five describes the most mature level. The scale points in between describe the levels leading to the maturation potentially possible…