Status Updates From Sex and Cognition (MIT Press)

"[on the verbal scale of WAIS] men have shown a small advantage in almost every standardized sample since the inception of the WAIS. In originally devising his IQ test, Wechsler omitted tests that yielded large sex differences (such as mental rotation tests), the intent being to equate IQ scores obtained between men and women. So it is despite this aim that there is a slight edge for men on the Verbal IQ..."