[depressedpanda]

Actually, the paper states:

> The differences were substantial: in some cases, such as total brain volume, more than a standard deviation. The effect size of d = −1.41 for total brain volume (Table 1) translates to 92.1% of males being above the female mean, and an 84.1% chance that a randomly-chosen male will have a larger total brain volume than a randomly-chosen female.

[zhdc1]

The height of the average male (178cm) is more than one standard deviation (8.9cm) above the height of the average female (165.1cm).

I don't really know if we should be surprised that the differences between male and female brain volumes are also statistically significant and larger than one standard deviation.