Two independent studies were conducted to investigate possible differences in General Aptitude Test Battery (GATB) aptitude M resulting from the use of different test equipment (wooden vs. plastic apparatus.) As part of a ten-year longitudinal study of Vocational Development being conducted in the Department of Vocational Education at The…

This study reports, for a group of 257 boys and a group of 286 girls, factor analyses of 43 Project TALENT aptitude and information tests, together with 48 tests from three multiple-aptitude batteries and one high-school achievement battery (The Flanagan Aptitude Classification Tests, Differential Aptitude Tests, General Aptitude Test Battery, and…

Academic psychology has long been composed of two disciplines, one experimental and one correlational. These two disciplines each developed their own method of studying structure in data: multidimensional scaling (MDS) and factor analysis. Both methods use similar kinds of input data, proximity measures on object pairs. Both represent the object…