ABSTRACT
In this research, we describe a longitudinal analysis of a dynamic hypothesis about the relationships among intellectual abilities. The Bradway–McArdle Longitudinal study includes 111 individuals who were repeatedly measured on up to six occasion between the ages of 4 and 64. In this research we first use contemporary measurement models to create comparable composite scores for both Verbal (g c) and Non-Verbal (gf or gυ ) intelligence measures from the early Stanford–Binet tests (at ages of 4, 14, 30, and 42), as well as the WAIS tests (at average ages 30, 42, 56, and 64). To evaluate the validity of R. B. Cattell’s dynamic growth hypothesis we use recent techniques of nonlinear structural analysis with incomplete data.
