Suggests that a careful review of the logical and empirical bases for the myth argument indicates that there is little to justify it. The evidence suggests that if one lives long enough, decrements in at least some of the important abilities of intelligence is likely to occur. (Author/AM)

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)

Some specific intellectual abilities show consistent sex differences which vary in degree according to types of tests and samples examined. Reviews the empirical support for these differences, as well as the methodological difficulties, data and sampling limitations, interpretative biases, and contradictory results of much of the sex-difference…