Age significantly predicted performances on six memory tests which clearly defied verbal labeling. Low scores of older persons were responsible for the age effect. The progressively lower recognition scores suggested that nonverbal memory processing through all three modalities was affected adversely by age. (Author)

This report reviews a theoretically inspired empirical investigation of individual differences in knowledge, abilities, and nonability traits as part of an ongoing effort to better understand adult intellectual development and to develop more accurate measures of adult intelligence. Twenty Knowledge Scales were constructed, drawing on…