An experiment with 77 people solving word puzzles at different times of the day indicates that our brains are better at integrating disparate pieces of information after a short bout of REM sleep.

People may not be able to assess their own body language to match their internal perceptions of themselves, in contrast to outside observers.

The perceptual system may not give us enough information to accurately judge the size of distant objects, and so we may develop a system of compensation as we grow older.

A way to simulate the feeling of déjà vu in the laboratory may have been found using brief glimpses.