“…Assuming an average lag of 20 years in the transition from theory/knowledge gains to their applications in practice, as Gallagher (1983) and Glaser (1976) have suggested, the earliest advances in this knowledge explosion are just now being reflected in the newest tests. Current concepts of the nature and development of ability (e.g., Gardner, 1983;Haywood & Switzky, in press;Horn, 1972;Sternberg, 1985) and of the relation between intellectual aptitude and other variables, must be taken into account in the construction of assessment procedures and instruments (Haywood & Switzky, 1986a).…”