In a study by Oster et al. (1992), 1-, 4- and 7-month-old infants were observed as their forearms were held down so that they could not move them. At what age did infants show a definite anger response?
a. 1 month
b. 4 months
c. 7 months
d. All of the infants showed an anger response.
Answer: C
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a. are more often rejected by their peers and do more poorly in sports. b. are likely to be popular with their peers and do well in sports. c. tend to like their bodies as well as children of average weight. d. None of the above
Which of the following best describes a characteristic of intersexual selection?
a. the tendency to view close relatives as unattractive b. ensuring species continuation via heterosexual behavior c. having characteristics that are likely to attract a mate of the opposite sex d. choosing a mate with genetic diversity
What is the deepest sleep, the one from which it is hardest to be awakened?
a. stage 1 c. the hypnagogic state. b. stage 4 d. REM sleep.
Primary amenorrhea may result from malformed or underdeveloped female reproductive organs, glandular disorders, general poor health, emotional factors, or ____
a. pregnancy c. surgical removal of the ovaries b. excessive exercise d. surgical removal of the uterus