Developmental psychology pays particular attention to the ef…

Developmental psychology pays particular attention to the effect of age on other variables. Two methods are used to take age into account. The approach compares people of different ages at the same time along some variable. The approach follows the same people for an extended period of time.

Jack is cutting up a pizza for himself and his little brothe…

Jack is cutting up a pizza for himself and his little brother, Craig. He starts to cut it into eight pieces, but his brother says, “Don’t cut it into so many pieces; I can’t eat that many.” Jack laughs but obeys. Craig’s reactions characterize thought, and Jack’s reactions characterize thought.