Research Reports - Differences according to sex in sociosexuality and infidelity after traumatic brain injury

Behav Neurol. 2015;2015:914134. doi: 10.1155/2015/914134. Epub 2015 Oct 12.

Moreno JA(1), McKerral M(1).

Objective. To explore differences according to sex in sociosexuality and
infidelity in individuals with TBI and in healthy controls. Participants.
Forty-two individuals with mild, moderate, and severe TBI having completed a
postacute TBI rehabilitation program, at least six months after injury, and 47
healthy controls. Main Measures. Sociosexual Orientation Inventory-Revised
(SOI-R) and Attitudes toward Infidelity Scale. Results. Overall, men score
significantly higher than women in sociosexuality. However, there was a
nonsignificant trend towards a reduction of sociosexuality levels in men with
TBI. Infidelity levels were comparable in healthy controls and individuals with
TBI. In individuals with TBI, less acceptance of infidelity was significantly
associated with an unrestricted sociosexual orientation, but not in healthy
controls. Conclusions. As documented in previous cross-cultural studies, men have
higher levels of sociosexuality than women. However, men with TBI showed a
tendency towards the reduction of sociosexuality. The possibility of a latent
explanatory variable is suggested (e.g., post-TBI neuroendocrinological changes).
TBI does not seem to have an impact on infidelity, but individuals with TBI who
express less acceptance of infidelity also report a more promiscuous mating
strategy regarding their behavior, attitudes, and desire. Theoretical
implications are discussed in terms of evolutionary theories of human sexuality
and neuropsychology.

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