sex is ‘easily assessed, routinely evaluated, and not always reported. Because it is more interesting to find a difference than to find no difference, the 19 failures to observe a difference between men and women go unreported, whereas the 1 in 20 finding of a difference is likely to be published.’4 This contributes to the so-called file-drawer phenomenon, whereby studies that do find sex differences get published, but those that don’t languish unpublished and unseen in a researcher’s file drawer.