Acute intranasal oxytocin improves positive self-perceptions of personality
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Research suggests the experimental manipulation of oxytocin facilitates positive interactions, cooperation, and trust. The mechanism by which oxytocin influences social behavior is not well understood.
We explored the hypothesis that oxytocin alters how people perceive themselves, which could be one mechanism by which oxytocin promotes prosocial behavior.
In a between-subject, randomized, and double-blind experiment, 100 university students received a 24 I.U. dose of intranasal oxytocin or placebo, and then completed the Revised NEO Personality Inventory (NEO-PI-R) and other self-report measures 90 min later.
Intranasal oxytocin increased ratings of NEO-PI-R extraversion and openness to experiences [F(1,98) = 4.910, p = .025, partial η 2 = .05; F(1,98) = 6.021, p = .016, partial η 2 = .06], particularly for the following facets: positive emotions (d = 0.48, p < .05), warmth (d = 0.47, p < .05), openness to values (d = 0.45, p < .05) and ideas (d = 0.40, p < .05), trust (d = 0.44, p < .05), and altruism (d = 0.40, p < .05). Oxytocin had no influence on ratings of negative emotionality, conscientiousness, rejection sensitivity, depression, worry, self-esteem, and perceived social support.
The administration of oxytocin improved participants’ self-perceptions of their personality, at least for certain traits important for social affiliation. Increased positive self-referential processing may be one mechanism by which oxytocin promotes positive social behaviors.
KeywordsIntranasal oxytocin Personality Trust Altruism Openness Extraversion Positive emotion Self-perception
This research was supported by grants to Dr. Ellenbogen from the Canadian Institutes of Health Research and the Canada Research Chair program (supported by the Social Sciences and Humanities Research Council of Canada). Christopher Cardoso is supported by a scholarship from the Natural Sciences and Engineering Research Council of Canada.
Conflict of Interest
- Barraza JA, McCullough ME, Ahmadi S, Zak PJ (2011) Oxytocin infusion increases charitable donations regardless of monetary resources. Horm Behav. doi: 10.1016/j.yhbeh.2011.04.008
- Beck AT, Steer RA, Brown GK (1996) Manual for the Beck depression inventory-II. Psychological Corporation, San AntonioGoogle Scholar
- Bryant RA, Hung L, Guastella AJ, Mitchell PB (2011) Oxytocin as a moderator of hypnotizability. Psychoneuroendocrinology. doi: 10.1016/j.psyneuen.2011.05.010
- Cardoso C, Linnen AM, Joober R, Ellenbogen MA (2011) Coping style moderates the effect of intranasal oxytocin on the mood response to interpersonal stress. Exp Clin Psychopharmacol. doi: 10.1037/a0025763
- Cohen S, Hoberman H (1983) Positive events and social supports as buffers of life change stress. J Appl Soc Psychol 58:304–309Google Scholar
- Costa PTJ, McCrae RR (1992) The NEO personality inventory (NEO-PI) and NEO five factor inventory (NEO-FFI) professional manual. Psychological Assessment Resources, OdessaGoogle Scholar
- Ellenbogen MA, Linnen AM, Grumet R, Cardoso C, Joober R (2011) The acute effects of intranasal oxytocin on automatic and effortful attentional shifting. Psychophysiology. doi: 10.1111/j.1469-8986.2011.01278.x
- Linnen AM, Ellenbogen MA, Cardoso C, Joober R (in press) Intranasal oxytocin and salivary cortisol concentration during social rejection in university students. StressGoogle Scholar
- McNair DM, Lorr M, Droppleman LF (1988) Manual for the profile of mood states. Educational and Industrial Testing Service, San DiegoGoogle Scholar
- Naber F, van Ijzendoorn MH, Deschamps P, van Engeland H, Bakermans-Kranenburg MJ (2010) Intranasal oxytocin increases fathers' observed responsiveness during play with their children: a double-blind within-subject experiment. Psychoneuroendocrinology 35:1583–1586. doi: 10.1016/j.psyneuen.2010.04.007 PubMedCrossRefGoogle Scholar
- Rosenberg (1965) Society and the adolescent self-image. Princeton Univ. Press, New JerseyGoogle Scholar
- Sobel ME (1982) Asymptotic intervals for indirect effects in structural equations models. In: Leinhart S (ed) Sociological methodology. Jossey-Bass, San Francisco, pp 290–312Google Scholar