The Stability of Patterns of Primary Mental Abilities Among Junior High and Senior High School Students

nesses relatively permanent? Do such profiles provide better predictions of future performance than can be made on the basis of an over-all assessment of intelligence? These questions were empirically examined in a recent paper by Tyler (1958). Only chance relationships between patterns obtained by children in the first grade on the Primary Mental Abilities (PMA) with their patterns obtained in the fourth grade on the same test were found. Considering the same two grade levels, the