The American College Testing (ACT) Program offers research services through which colleges can predict the freshman grades of their future students. This paper describes research done to establish a minimum sample size requirement for calculating least-squares prediction equations for college freshman grade average. Prediction equations were…

Undergraduates (n=99) differing in spatial ability were tested on problems involving the mental rotation of familiar alphanumeric stimuli and unfamiliar stimuli drawn from the Primary Mental Abilities Space Test. Individual differences in spatial ability were associated with speed rather than accuracy of mental rotation processes. Ability…

A regression analysis of per pupil current expenditures across public elementary schools in Hawaii indicates that Hawaii's system of full State funding of its schools has not completely eliminated a positive correlation between expenditures and family income. This correlation is the result of a direct relation between teacher salary expenditures…

In 1975 the Ontario Ministry of Education assigned major responsibilities in curriculum development to local school boards. School boards responded by establishing or expanding special units to develop local programs. At the present time, the organization of these units or program departments varies widely. The focus of the present study is to…

The purpose of this paper is to illuminate the advantages of path analysis for the exposition of results in data analytic papers. Probably the greatest advantage is that it provides a means by which the nature of the problem may be handily summarized. The method of path analysis, although conceived over sixty years ago by Sewell Wright, has only…

Examination of the relevant literature indicates that most studies of school structure and interpersonal relations have either been too narrow in scope, too theoretical, or too tied to the individual as the unit of analysis to support any conclusive generalizations. A search of the literature for appropriate variables to include in a more complex…

This study, carried out in connection with the 1971-72 field test of the "Developing Mathematical Processes" program, was an investigation of relationships among the teacher characteristics, teaching behaviors, and criterion-referenced student performance in mathematics. Students in 15 class samples of size six, along with their…

A general procedure is presented for generating code values for a qualitative variable in multiple linear regression analyses that result in directly interpretable estimates of interest. The basic approach, in viewing ANOVA as a multiple regression problem, is to derive quantitative code values for the various levels of the qualitative ANOVA…

Data from 80 junior high school students who completed the Assessment of Language and Reading Maturity (ALARM) test battery were used to delineate elements within the concept of mature reading comprehension. Stepwise multiple regression analyses were performed on the 15 ALARM test factors to isolate both the principal elements and the "trace…

Joreskog has developed a very general and powerful model and computer program for analyzing relationships among variables, called LISREL. Structural analysis of covariance matrices by Joreskog's LISREL method is proposed as an alternative to regression methodology in the analysis of aptitude-treatment interaction (ATI) data. LISREL resolves some…

Brief descriptions are provided of general-purpose mathematical and statistical software, including 27 "stand-alone" programs, three subroutine systems, and two nationally recognized statistical packages, which are available in the Air Force Human Resources Laboratory (AFHRL) software library. This index was created to enable researchers…

This report documents the theory, structure, and implementation of a performance processor (written in FORTRAN IV) that can accept performance demonstration data representing various levels of operator's skill and, under user control, analyze data to provide candidate performance measures and validation test results. The processor accepts two…

The efficacy of a variety of selection measures in predicting successful performance in Air Force physician assistant training were investigated. Variables identified for the analysis of 51 subjects (graduates of the Air Force program) were: Scholastic Aptitude Test (SAT, combined verbal and mathematics composites), Airman Qualifying Examination…