501. Search for a Common Factor Model to Describe a Cross-Lagged Correlation Difference
- Author
-
Lloyd G. Humphreys and Charles K. Parsons
- Subjects
Common factor model ,Comprehension ,Correlation ,Intellectual development ,Cross lagged ,Statistics ,Psychology (miscellaneous) ,Test validity ,Predictor variables ,Psychology ,Social Sciences (miscellaneous) ,Listening test - Abstract
This study describes the development of a com mon factor model for a cross-lagged difference in volving a measure of aural comprehension and an intellectual composite. The direction of the dif ference was that the Listening Test predicted the composite more accurately than the composite pre dicted the Listening Test. A complex model which allowed seemingly identical common factors ap pearing at different ages to be highly, but imper fectly, correlated fit the 32 x 32 table of intercorre lations of 16 variables measured at each of two time periods. The model also described quite accurately the multiple correlations on which the cross-lagged difference was based. Aural compre hension at grade 5 was equidistant from the vectors of the two general factors at grades 5 and 11; but aural comprehension at grade 11, while close to the general factor at grade 11, was outside the space created by the two general factor vectors. Individual differences in aural comprehension anticipated by several years changes in rank on the general factor as defined by standard tests.
- Published
- 1978