Andy has repressed an early sexual attraction to his mother; the tunnel symbolizes her vagina

The point at which a person can detect a stimulus 50 percent of the time it is presented is called the ______threshold

a. absolute c. range b. difference d. noticeable

Which of the following statements on infant social interactions is TRUE?

A) Infants are able to play by imitating each other's actions at about six months of age. B) Differences in temperament rarely contribute to infants' interaction style. C) Infants vary greatly in social responsiveness. D) Infants begin to show interest in people their own size around the age of four months.