Studies of the ability of infants to respond to other people's emotional expressions have found that
a. infants as young as three days of age are able to imitate several facial expressions modeled by an adult.
b. two-week-old infants can discriminate the emotional displays of others but cannot yet imitate them.
c. the ability to discriminate among different emotions emerges at about three months of age.
d. adult observers are unable to identify the facial expressions that young infants are attempting to imitate.
A
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Indicate whether this statement is true or false.
A junior high coach decides to separate his basketball players into an A team and a B team. These two teams regularly play each other and compete for rewards, such as time at the drinking fountain and use of the new basketballs. The Robbers Cave experiment would suggest that the coach's new arrangement is likely to
a. promote team unity. b. lead to animosity between the A team and the B team. c. encourage the development of leadership skills. d. lead to less vigorous practices.
What values are specified by the null hypothesis for a chi-square test?
a. Frequencies for a sample c. Proportions for a sample b. Frequencies for a population d. Proportions for a population
The hormone testosterone is related to ________, whereas oxytocin is related to ________
A) sexual receptivity in only men; sexual receptivity in only women B) sexual desire in both men and women; sexual orgasm in both men and women C) sexual desire in only men; sexual orgasm in only women D) sexual desire in both men and women; sexual receptivity in only men