According to Erik Erikson, the developmental period during which teenagers seek to determine what is unique and distinctive about themselves is called __________.

Among adult humans, those who sleep ____ or more hours per night have the highest percentage of REM sleep

a. 9 b. 5 c. 8 d. 10

Claire and Dan are motivated to maintain their relationship even through the difficult times. What does their relationship demonstrate?

a. passion c. intimacy b. concern d. commitment