Specifications are offered for a stage theory of adult cognitive development. Current psychometric technologies are criticized as being limited in descriptions of cognitive function. The development of novel technologies is suggested for study of adult cognitive development. Paper presented at the 10th International Congress of Gerontology,…

Education, not age per se, is related to conservation ability during the adult years. Age differences should not be interpreted as age changes without using the more appropriate designs which separate age and cohort effects. Results emphasize the relationship between education and cognitive abilities among the elderly. (Author)

Examined age differences in self-ratings of present and projected past and future cognitive performance across cognitive domains. Findings from 151 adults in their 20s, 40s, 60s, and 80s revealed that performance on fluid/speeded intelligence, memory, and reasoning tasks followed progression of poorer performance with age. Found age differences in…