There is evidence that when spatial orientation and spatial visualization are measured with either the French or Guilford-Zimmerman tests that the variance due to authorship is greater than that due to trait. (Authors)

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 French and Guilford-Zimmerman measures of spatial orientation and spatial visualization factors are compared. Both approaches to measurement are described. A study to assess the two approaches is reported. Both tests were administered to 40 college sophomores in a classroom setting according to published instructions. Pearson product-moment…

Logical predictions about relationships between school aptitude and standardized achievement, aptitude and teachers' grades, and teachers' grades and standardized achievement can be made from the literature. These predictions are that (1) conventional school aptitude measures should predict standardized achievement test scores equally well for…

During the course of investigations on such topics as the instructional styles, interaction patterns and personality characteristics of teachers, the organizational structure of schools, the technology of instruction, and the affective and cognitive growth of students, researchers have developed hundreds of psychological and educational…