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Social closeness increases salivary progesterone in humans |
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| Authors: | Stephanie L. Brown Barbara L. Fredrickson Michael J. Poulin Emily D. Heaphy Oliver C. Schultheiss |
| Affiliation: | a VA Health Services Research and Development Center of Excellence, VA Ann Arbor Healthcare System, Ann Arbor, MI, USA b Center for Behavioral and Decision Sciences in Medicine and Division of General Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, MI, USA c Department of Psychology, University of North Carolina, Chapel Hill, NC, USA d Department of Psychiatry, University of Wisconsin, Madison, WI, USA e Department of Psychology, State University of New York, Buffalo, NY, USA f Department of Psychology, University of Michigan, Ann Arbor, MI, USA g Desautels Faculty of Management, McGill University, Montreal, Quebec, Canada h School of Information, University of Michigan, Ann Arbor, MI, USA i Department of Psychology, Friedrich-Alexander University, Erlangen, Germany |
| Abstract: | We examined whether interpersonal closeness increases salivary progesterone. One hundred and sixty female college students (80 dyads) were randomly assigned to participate in either a closeness task with a partner versus a neutral task with a partner. Those exposed to the closeness induction had higher levels of progesterone relative to those exposed to the neutral task. Across conditions, progesterone increase one week later predicted the willingness to sacrifice for the partner. These results are discussed in terms of the links between social contact, stress, and health. |
| Keywords: | Progesterone Altruism Affiliation Social closeness |
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