Cognitive Neuroendocrinology: Risk Preference Changes Across the Menstrual Cycle

Abstract

There is growing evidence that hormones play an important role in a number of cognitive processes.This challenges the concept of the brain as a computer in favor of it being thought of as a gland.However studies of hormones and cognition have often lacked clear hypotheses.The current study based its hypothesis on an evolutionary analysis.Previous studies suggest that women selectively reduce activities increasing risk of sexual assault when ovulating.Oral contraceptives blocked this effect, suggesting a hormonal mechanism.This study tested if there was a general decrease in risky choices during ovulation.176 women were classified as menstrual, postmenstrual, ovulatory or premenstrual, and chose between a guaranteed ($85) or risky outcome (85% chance of $100).Phase affected rate of risky choice only for women not taking contraceptives.The effect was entirely due to risky choices dropping to 0% for ovulating women not taking contraceptives.This adds to evidence that understanding neurochemistry is important for understanding decision making, and adds to the plausibility of a field of cognitive neuroendocrinology.

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