Research by Romero, Villar, Luengo, and Gomez-Fraguela suggests that:
a. introverts are more optimistic about achieving success in the pursuit of their goals than extraverts
b. extraverts are more optimistic about achieving success in the pursuit of their goals than introverts
c. both introverts and extraverts are equally happy and optimistic about achieving success in the pursuit of their goals
d. both introverts and extraverts are very pessimistic about their chances of achieving success
Question 2
In their research examining differences between extraverts and introverts in social interactions and happiness, Srivastava, Angelo, and Vallereau found that extraverts:
a. had fewer social interactions in a day than introverts
b. had more social interactions in a day than introverts
c. were less happy than introverts
d. were very unhappy
Some organisms used as models in genetic research
Field research on free-living primates allows primatologists to study patterns of behavior in the se
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