Children have a sense of self-esteem—a characteristic that stays relatively stable throughout their life—by age 5, even before they begin kindergarten, a new study shows.

How strongly children identify with math—their math “self-concept”—can predict how high they will score on a standardized test of math achievement, a new study shows.

A new study is the first to link an early social behavior called gaze shifting with infants’ ability to learn new language sounds.