The relative power of three possible experimental designs under the condition that data is to be analyzed by nonparametric techniques; the comparison of the power of each nonparametric technique to its parametric analogue; and the comparison of relative powers using nonparametric and parametric techniques are discussed. The three nonparametric…

The feasibility and effectiveness of a Bayesian method for estimating regressions in m groups is studied by application of the method to data from the Basic Research Service of The American College Testing Program. Evidence supports the belief that in many testing applications the collateral information obtained from each subset of m-1 colleges…

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…

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…

The objective of this British study was to establish which factors determined an individual's choice of major and to ascertain whether students choosing the same did so for similar reasons. Polytechnic students were surveyed and the results were subjected to multivariate statistical analysis. (Author/LBH)

The teacher who holds enlarged perspectives is regarded more highly than the teacher whose views tend to narrow perspectives. Since children will be influenced by their teacher's attitudes, an examination of the variables related to enlarged perspectives in teachers is pertinent to a broad education. This research looks at those variables among…

The predictive validity of the PCAT-Arithmetic Skills and PCAT-Mathematical Reasoning portions of the PCAT is questioned as applied to pharmacy students at the Medical College of Virginia/Virginia Commonwealth University. (LBH)

Determination of the amount parents are expected to contribute toward the cost of postsecondary education involves several financial and nonfinancial variables of the family that influence ability to pay. Data from 45,199 records suggest that stepwise regression analysis is not effective in simplifying need analysis procedures. (LBH)

Based on a microeconometric examination of Philadelphia school district data, analyzes the impact on student achievement of pupil-specific variation in students' genetic endowment and socioeconomic status, teacher quality, nonteacher school quality, and peer group characteristics. Single copies may be purchased from Secretary, C. Elton Hinshaw,…

Using 3,355 class section means, the relationship between six predictor variables and student ratings of instruction was investigated. All linear interactions were found to be negligible although two predictor variables, expected grade and required-elective, provided large contributions to the prediction of the criterion measure. (Author/LBH)

Data from the National Research Council's Doctorate Records File extract prepared for UCLA indicated that source of support was the most important variable in predicting time to doctorate. Following source of support were postdoctoral plans, number of dependents, sex, and field of study. (Author/MLW)

The results of this issue's series of articles are summarized, and implications for theory, research, and practice are discussed. Initial academic achievement was the strongest predictor of student achievement. The impact of attentiveness, motivation, student background, sex, and time on task were also described. (GDC)

Results suggest that while homework assignments, tests, and required texts increase the time students allot to a given course, and time allocated to a given course has a positive effect on course grades, the combination has a negative effect on course grade. High school performance is positively related to time given to a course but not to course…

Determines the frequency distribution of Brainstem Auditory Evoked Potential variables (BAEP) for premature babies at different stages of development--normal newborns, infants, young children, and adults. The author concludes that the assumption of normality underlying most "standard" statistical analyses can be met for many BAEP…