A visual illusion that causes adults to misjudge objects’ sizes doesn’t affect young children, a new study finds.

Study of hunter-gatherer community in Tanzania shows that, across human groups, mating criteria vary. (p. 14)

Scientists are unveiling how the brain works when hypnotized (p. 26)

New, higher prevalence rates for certain mental disorders fuel a debate over how to revise psychiatric diagnoses. (p. 5)

Man-made music inspired by tamarin calls seems to alter the primates’ emotions, a new study suggests. (p. 10)

A 10-year-old Chinese boy listens intently as a visiting researcher tells him a story. It begins pleasantly enough: A boy named Xiaoming goes to a park and meets a child playing with a new ball. But after joining in the fun, Xiaoming decides that he wants to play with the ball alone. So he hits the other child, knocks him down and lunges for the ball. The victim hangs on to the ball and runs home crying. Meanwhile, Xiaoming’s mother witnesses the whole encounter. Not surprisingly, she is horrified. The researcher describes four possible actions taken by Xiaoming’s mother. In one, she... (p. 16)

At 11 months of age, girls quickly learn to associate fearful faces with images of snakes and spiders, a new study suggests. (p. 11)

People walk in circles when landmarks and other directional cues are not available. (p. 14)

New work shows that the “rubber hand illusion” only works when a hand feels a sensation no more than 300 milliseconds before the eyes see it