Evolution Chapter 6

Theories of men’s Short-Term Mating (STM) include?

Trivers’ (1972): Sex differences in short-term mating (STM) due to sex differences in minimum parental investment (PI)

Direct reproductive benefits to men pursuing STM.

What are the potential costs to men of STM?

STDs, social reputation of “womanizer” damaging LTM, lower chance of offspring surviving due to lack of PI, violence from husbands, brothers, and fathers, and retaliatory affairs from wives and potential divorce.

If the benefits of STM is greater than costs, selection would have favored it; therefore, there has to be SOME benefits, but also many problems. TRUE or FALSE?

TRUE, there are many problems, but men come up with many adaptions to solve them.

When pursuing STM, men have a problem with PARTNER NUMBER OR VARIETY. How do they solve this problem?

1. Desire for sexual access to many women

2. Relaxation of standards in ST mating

3. Impose minimum time constraints to sex

When pursuing STM, men have a problem with SEXUAL ACCESS. How do they solve this problem?

1. Resources provided w/o exchange of sex interfere w/ STM

2. Expect men to have adaptions that predict sexual access and motivate pursuit of bets prospects

When pursuing STM, men have a problem with IDENTIFYING WOMEN’S FERTILITY. How do they solve this problem?

1. Men w/ ST mates look for FERTILITY

2. Men w/ LT mates look for REPRODUCTIVE VALUE

When pursuing STM, men have a problem with AVOIDING COMMITMENT. How do they solve this problem?

1. Larger investment in one woman leads to fewer sex partners which is unwanted, so they do not invest.

2. Men w/ ST mates, avoid women wanting LT mates.

3. Affective Shift Hypothesis (Haselton & Buss, 2001)

What is the psychological evidence of evolutionary history of STM?

Desire for a variety of sex partners (Buss & Schmitt, ##??)

Time elapsed before seeking sex (Buss & Schmitt, ##??)

There is a lowering of standards for STM

High standards exclude majority, so men lower their standards; specifically, lowering for 41 out of 67 desirable traits for STM compared to LTM.

Buss & Schmitt, 1993: College men accept age range of 4yrs wider than women for STM (men = 16-28, women = 18-26)

There is a cognitive bias for interpretation of stimuli as sexual, what is it called and what are false negative and false positives?

Sexual overperception bias; Haselton, 2003:

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