class15 - Individual Differences in Mating Psychology...

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Individual Differences in Mating Psychology
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Individual Differences in Mating Psychology Well-researched dimension along which people vary is “Sociosexual Orientation” (SOI) Measures both attitudes towards sex and sexual behaviors Results in score that is continuously distributed; lower bound close to zero, upper bound unconstrained Low SOI people (“restricted sociosexual orientation): Demand commitment and closeness in a relationship before engaging in sex High SOI people (“unrestricted sociosexual orientation”): Comfortable engaging in sex with less commitment or closeness
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Behavioral items Attitudinal items
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Validation of SOI Scale SOI does not seem to index general sex drive or libido (discriminant validity) Could have strong sex drive within context of stable, committed relationship but not be willing to have uncommitted sex • For couples in sexual relationship, no correlation between SOI scores and frequency of sex in last month for either men or women Higher SOI people self-report having sex earlier after relationship initiation than low SOI people Higher SOI people self-report more likely to have had sex with another person while dating current partner High SOI people report lower commitment to relationships This does not seem to be lost on their partners… Construct validity
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Validation of SOI Scale
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Individual Differences in SOI Men (on average) reliably have higher SOI scores than do women, especially for attitude measures Expected from PI theory Men can convert short-term mating, multiple partners into offspring at much higher rate than women can However, within-sex variance in SOI scores tends to be greater than between-sex variance
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SOI at UCSB Total SOI scores 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 more SOI score proportion of population Females Males ~ Female mean ~ Male mean
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SOI – Attitudinal Measures Notice that these do not tap actual sexual activity; could be very unrestricted attitude, but have little opportunity
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SOI Attitude Items Attitudinal SOI scores 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Attitudinal SOI proportion of sample Females Males Female mean ~20% of males Male mean
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SOI Behavioral Measures: Number of Sex Partners (UCSB) 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 more Lifetime # Partners Proportion of Sample Males Females
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Sex differences mostly driven by attitudes Behaviors probably *would* be different, if possible Clear that individual differences present in both males and females Attitudinal SOI scores 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
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class15 - Individual Differences in Mating Psychology...

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