Using sufficiently large samples, statistically significant sex differences are demonstrated for all 10 of the Wechsler subtest dimensions employed by the Personality Assessment System. The magnitudes of these effects vary widely. 85% to 90% of the effects are associated with the basic level of the Personality Assessment System and, to this degree, it is suggested that sex differences on the WAIS are learned rather than innate. Inferences based on these effects are justifiable in some but not all individual cases.
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