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Lecture 14

Outline Lecture 14 Mating 3.odt

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PSYC 3100
Pat Barclay

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Outline Lecture 14 Mating 3 A. To Bond or Not to Bond? 1. Time Budgets – Somatic effort vs. reproductive effort (which is mating effort + parental investment) -evolutionary tradeoffs: all organisms have limited time and energy budgets. Time/effort solving one problem means less time/energy available for other problems – somatic effort: investment in growth & maintenance. Anything that promotes well being (job, education) – reproductive effort: mating effort + parental investment. Things one needs to reproduce, attract a mate, hold onto a mate, raise kids. – Mating effort: effort expanded in attracting or retaining mates (weaponry, etc) – parental investment (P.I.): any investment that increases an offsprings survival (& reproduction) but decreases the parent's ability to invest in other (including future) children. – time÷effort spent on mating effort cannot be spent on parental investment, vise versa 2. Why Form Long-Term Bonds? -imagine this: you've just met someone who is interested in you (& possibly mated with him/her) Q: should you form a long-term pair with him/her? -which one provides a higher return: mating effort (towards others) vs. parental investment does attempting to remate > attempting to pairbond? Attempting to pair-bond: -guaranteeing conception with that person -future offspring with same partner -effects of parental investment on children's success -mutual cooperation & division of labor Attempting to remate: -likelihood of remating (including availability of mates and your likelihood of getting one (how many fish in the sea? What is likelihood of catching one?) -effect of your reproductive success of mating with an additional person 3. Different Strategies for Different Folks -focus on long term -advertise character, partner fidelity -focus on short term -spend more time advertising individual quality: attractiveness, physical ability **strategies that pay off for some may not payoff for others** – Facultative responses: strategies which are contingent on one’s condition/situation -single mental design, but different behaviours depending on one's condition or situation (same mentality, but some individuals are better and worse off than others) -different individuals face different conditions, so their “best responses” or “optimal strategies” may differ -e.g. “if big, be aggressive. If small, be conciliatory -e.g. “if attractive, pursue ST strategy& be more discriminating. If not, offer LT strategy and/or be less discriminating Attractive men: -less restricted attitudes about casual sex -invest more in pursuing affairs -invest less in relationships (all else equal. e.g. quality of his partner Attractive women: -greater preference for symmetry in good looking women - The “best” mating strategy depends on one’s mate value - Stressful environments: why wait for a better future if it’s unlikely to come? -tradeoff of somatic vs. reproductive effort: -if fu
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