Extras

Eye-catching studies that didn't make the final cut:

The notices in hotel rooms asking if you want to reuse your towels should be rewritten to emphasise the fact that most people do reuse their towels - that way you will be more likely to do the same.

Mathematical models of human decision making are more accurate when they factor in the important role played by regret.

Comparing the ways we gesture when speaking face-to-face, on the telephone, or dictating to a voice recorder.

What internet predators are really like (pdf).