Cohort-sequential analyses were conducted on measures from the Primary Mental Abilities Test and the Test of Behavioral Rigidity for 2,151 participants at the first testing and 723 individuals at the retesting 7 years later. Data were examined for 7-year age intervals from 25 to 81 years and cohort intervals from 1889 to 1938. (Author/JMB)

Concludes "that the one seemingly serious effort of Baltes and Schaie to contest the points of the Horn-Donaldson criticisms only brings us around to the same sad conclusion: that no matter how one looks at the Schaie data, it suggests that, on the average, there is age decline in many important abilities of intelligence." (Author/JM)

This document examines three important national surveys that provide periodic longitudinal data on the transition to adulthood during the late 1960s and 1970s: (1) the Parnes Young Men and Women Panels, initiated in 1966 and 1968; (2) the Panel Study of Income Dynamics, initiated in 1968; and (3) the National Longitudinal Study of the High School…