The effect of acting extraverted versus introverted on affect: testing the reward sensitivity model Public Deposited

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  • March 21, 2019
  • McNiel, J. Murray
    • Affiliation: College of Arts and Sciences, Department of Psychology and Neuroscience
  • A considerable body of research documents the relationship between dispositional extraversion and positive affect, and one recent study found that acting extraverted versus introverted for a short period of time (the manipulation of state extraversion) had an effect on positive affect (McNiel & Fleeson, in press). Building on this work, this study had three purposes: (i) to replicate the finding that the manipulation of state extraversion influences positive affect; (ii) to test whether reward sensitivity is a mechanism in the effect of state extraversion on positive affect via two different types of reward stimuli; and (iii) to determine how the manipulation of state extraversion influences other types of affect. State extraversion was found to have a strong effect on positive affect in a 10-minute dyadic discussion. However, no support for reward sensitivity as a mechanism was found. One type of potential reward stimuli, affectively valenced pictures, did not appear to function as effective reward stimuli. A second type of potential reward stimulus, the physical attractiveness of one's interaction partner, functioned as a reward stimulus but was unrelated to how much state extraversion influenced positive affect. Finally, state extraversion had effects on various types of affect as defined by an affect circumplex. Acting extraverted had the strongest effect on positive affect, and it also had smaller (but still strong) effects on pleasant and activated affect, with these latter two effects being almost equal in magnitude.
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  • Lowman, Joseph
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  • University of North Carolina at Chapel Hill
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