How have the relative scores of Blacks and Whites on IQ tests changed over time, if at all?
a. The difference between the mean scores has fluctuated up and down repeatedly.
b. The trend has been for the difference between Blacks and Whites to increase.
c. The trend has been for the difference between Blacks and Whites to decrease.
d. The difference between Blacks and Whites has remained constant for many decades.
c
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Which of the following would be a violation of display rules in American culture?
a) Members of a losing sports team smile and congratulate the winning team. b) When Bobby's grandmother gave him underwear instead of a toy for his birthday, Bobby made a face and said it was "yucky." c) Fans at a baseball game yell, "Boo!" when the umpire made a call against the home team. d) A college professor smiles patiently while listening to a failing student list excuses for why assignments haven't been completed.
When Rovee-Collier and her colleagues attached a ribbon from a mobile to 2- to 3-month-old infants' legs, so infants learned to kick to make the mobile move, they found that when they returned to the babies' homes several days later the babies
a. had forgotten that kicking made the mobile move. b. would still kick to make the mobile move. c. had lost interest in the mobile. d. would cry when they saw the mobile.