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Applied Psychological… | 2 |
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Guttman, Ruth | 1 |
Levin, Joseph | 1 |
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Levin, Joseph – Applied Psychological Measurement, 1993
Longitudinal studies of personality traits and intelligence have used an exponential function to relate magnitudes of correlations between occasions to the time interval. This exponential function is shown to be equivalent to a quasisimplex model of a stationary process with constant reliability. (SLD)
Descriptors: Correlation, Equations (Mathematics), Intelligence, Longitudinal Studies

Guttman, Ruth; And Others – Applied Psychological Measurement, 1990
After a brief review of the contributions of factor analysis and regional analysis to the elaboration of the structures of spatial abilities, a facet design and regional model for spatial abilities are presented. A cylindrical-wedge model is proposed to represent the correlational structure of spatial ability tests. (SLD)
Descriptors: Cognitive Structures, Epistemology, Factor Analysis, Intelligence