Cultures such as Africa and Central America hold infants upright rather than lying them down in a cradle or crib.
Infants in these cultures tend to
A. walk at an earlier age than western infants.
B. walk at a later age than western infants.
C. speak at a later age than western infants.
D. do none of these.
Answer: A
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Sally is dependent on a drug that energizes her central nervous system and produces euphoria. It is likely that the drug is a ____
a. depressant c. hallucinogen b. stimulant d. painkiller
Timmy takes out the garbage and his mother praises him when he does it. When his mother stops praising him, Timmy stops taking out the garbage. Timmy's behavior of taking out the garbage has been:
a. punished b. extinguished c. reversed d. negatively reinforced
Gretchen is watching her infant McKenzie sleep. Gretchen notes that McKenzie's eyes dart back and forth beneath her eyelids. This suggests that McKenzie is
a. experiencing sleep spindles. b. dreaming. c. in Stage 4 sleep. d. experiencing delta waves.
Suppose that it is customary in Boogravia for parents of identical twins to treat them exactly alike: same diet, same clothes, same school, same parental attention, etc. On a measure of self-awareness, the correlation for identical twins reared together is strong: r = +0.99 . The measure of nonshared environmental influences (NSE) will be
a. very low; NSE = +0.01. b. low: NSE = +0.10. c. moderate: NSE = +0.50. d. high: NSE = +0.80.