Marissa and Melissa are twins and are genetically identical. Which term would a geneticist use to describe them?
A. gamete-deprived twins
B. dizygotic twins
C. monozygotic twins
D. replicated twins
Answer: C
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Research on behavioral genetics suggests that, for psychological variables such as personality characteristics, the most important environmental influences are likely to be those ____
a. ?shared by family members who live together b. ?not shared by family members in general c. ?shared by genetically related family members d. ?not shared by family members of the same sex
Which statement regarding temperament is false?
a. Identical twins are more similar in temperament than are fraternal twins. b. Some temperamental characteristics are more common is certain cultures. c. Environmental factors are not related to emotionality d. The confidence level of mothers is related to temperament.
Ten-month-old Vanessa is overheard by her mother saying "ah-doh-doh-doh-doh" then "oh-gah-gah-gah," as if she were having a conversation with herself. This is an example of ____.
A. intonation B. echolalia C. cooing D. babbling
Critics of modern ESP research argue that subjects who temporarily show ESP have received credit for
a. a run of luck. b. reading impressions through the backs of Zener cards. c. the experimenter's own psychic ability. d. having a bad psi day.