Gender differences in spatial ability in old age were examined and the effectiveness of cognitive training in reducing these differences was assessed. Age-related decline in the speed of problem solving, especially for men, was noted. Following training on mental rotation ability, there was no significant gender difference in spatial ability…

The basic issue underlying this research is whether or not adult personality structures change after maturity is reached. Problems involved in the longitudinal study of psychological variables are discussed and 2 feasible designs applied in an effort to differentiate the effects of chronological age, secular trends, generation differences, as well…

The selected bibliography contains about 400 references taken from a keysort file of more than 45,000 references, compiled from commercially available data bases and published sources, relevant to gerontology. Those of questionable accuracy were checked or deleted during the verification process. Most references are in English and were selected…

It is argued that external validity across situations and life stages cannot be obtained for any single measure of intellectual ability. Presented at 84th Annual Meeting of the American Psychological Association, Washington, 1976. (Author/PD)

Mandatory retirement because of chronological age is coming under increasing attack and, at least in the United States, it is likely that there may soon be legislative prohibitions against forcing individuals to retire because of age. As a consequence there is renewed interest in redefining retirement criteria in terms of a functional age concept…

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)