What we're suggesting, and this remains to be tested by further work, that in men it isn't the size of the overall brain that is correlated with how well they do on all these mazes and three-dimensional perception tests, but it might be the structure, it might be the size or the anatomical microscopic structure of the region in the brain that is important for that kind of thinking.  -   Sandra Witelson     Quotes
What we're suggesting, and this remains to be tested by further work, that in men it isn't the size of the overall brain that is correlated with how well they do on all these mazes and three-dimensional perception tests, but it might be the structure, it might be the size or the anatomical microscopic structure of the region in the brain that is important for that kind of thinking. Sandra Witelson