[nopatternhere]

I hate the high end examples, because people want to argue them. The case is also true the other way - there are more men at the bottom of the IQ scale. Can someone come up with a reason why an IQ test would make men appear more often in the bottom of IQ distributions?

[Malice]

Because of "significantly higher variance in male scores"

[stagbeetle]

I have no evidence, only speculation, but it could be because boys do not receive the same type of nurture and care growing up compared to girls. As well as, anecdotally, being more likely to engage in dangerous (for the brain) activities and take less care of themselves. The last point manifests itself in many ways, but the most important one I can think of is diet.

Again, this is all conjecture and I don't know how I would go about finding the studies to link it together.