A baby will display the Moro reflex when his caregiver
A) shines a bright light at his eyes.
B) produces a sudden loud sound against the surface supporting him.
C) places him face down in a pool of water.
D) strokes his cheek near the corner of his mouth.
Answer: B
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Harlow's research with infant monkeys who were reared with surrogates suggests that
a. infant monkeys do not derive comfort from nonnutritive sucking. b. softness and warmth are inherently more reinforcing than the mother's characteristic body scent. c. physical contact with cuddly objects is a biological need. d. deprivation of contact with the mother is more serious than deprivation of contact with peers. e. research with nonhuman primates is difficult to generalize to human infants.
Approximately__________ of women experience premenstrual physical or mood-related symptoms severe enough to interfere with their daily functioning, including causing absenteeism from work or producing significant emotional distress
a. 10% c. 30% b. 20% d. 50%