In Bronfenbrenner's terms, those systems that affect an adolescent directly, such as families and friends, make up the

Zeena is 3 months old. She is taking part in a research study in which one end of a string is tied to her wrist and the other end is tied to a screen. When she moves her hand, the screen lifts and she can see a toy on the other side. How many days after learning this task will Zeena be able to remember it?

a. 12 hours b. 1-2 days c. 3-4 days d. More than one week

A sleep disturbance in which one awakens several times during the night and has difficulty returning to sleep is

a. narcolepsy. b. sleep apnea. c. somnambulism. d. insomnia.