This study examined the teaching practices of 227 college instructors of introductory statistics (from the health and behavioral sciences). Using primarily multidimensional scaling (MDS) techniques, a two-dimensional, 10-item teaching practice scale, TISS (Teaching of Introductory Statistics Scale), was developed and validated. The two dimensions…

Graduate psychology students were presented with statistical concepts and asked to rate their similarity-dissimilarity. Multidimensional scaling was used to judge how students organized the concepts. Results showed that the students were able to organize the materials into a meaningful structure only after the concepts were presented in an…

In recent years, there has been increasing interest in finding ways of promoting and evaluating structural knowledge (knowledge of how ideas, events, and principles are interrelated). Research has demonstrated that students' numerical judgments of the strength of relatedness among ideas drawn from a domain provide insights into how they have…

The model of cognitive ability proposed by John B. Carroll is described and its implications for education traced. The Carroll model is unique in that it is based on datasets reanalyzed by standard procedures. The variables and factors established through factoring were used to construct the three-stratum Carroll model. (SLD)