Class Notes (835,385)
Canada (509,147)
Psychology (3,977)
PSYC 3100 (223)
Pat Barclay (116)
Lecture 11

Outline Lecture 11 Mating 1.odt

3 Pages
Unlock Document

PSYC 3100
Pat Barclay

Outline Lecture 11 Mating 1 A: Some basic predictions 1. What would an outside observer predict about human mating? 2. “Would you…” -men and women similar on going on a date -much more men than women say they would go back to apartment (70-8%) -same thing with gong to bed with the person 3. Basis of Predictions: – Differences in minimal parental investment: who has the bigger gamete? (sperm vs. Egg) – female carries offspring till birth (9 months), minimum is higher for females – Biased “Operational Sex Ratio” (this is different from sex ratio) – sex ratio: males:females – OSR: number of males:females who are able to reproduce at that time – sometimes females are not able, at some time there will be more males:females who can reproduce at that time – in some species, minimal parental investment is more for males (seahorses) 4. Predictions - Sex differences in body size and/or weaponry: males may have bigger bodies and weapon, on average human males are stronger and larger than females - Delayed maturity in males: pays to wait a little, build more muscle, social status, etc. Holding off and building up capital before the competition starts. In humans females begin puberty years earlier than guys do. – Sex differences in mortality & longevity: external causes: take bigger risks (physical and social) to attract mates; internal causes: short-term physiological versus despite long-term negative effects (e.g. physiological costs of testosterone) whether internal costs or external costs, men are taking bigger risks and dying more at every age - Sex differences in willingness to engage in sex: male reproductive success (RS) increases with each additional mate, whereas females do not gain as much from mating again; Males benefit more from multiple mates and from mating again soon than do females; Result: males in polygynous species are more willing to have sex; In every region, men desired more partners over the next 30 years than women did The Coolidge Effect: male refractory period decreases when a new female is introduced males more ready to have sex with a new female than with the same femaled B: Effective Polygyny (i.e. greater variance in male RS than in female RS) -for long term relationships, both sexes invest alot -sex differences in choosiness diminish for long term relationship; for one night stands and dates, women are more choosy than men are. -women have larger minimum investment, & so are more choosy for short-term relationships 5. Causes – Polygynous versus monogamous marriages: polygyny: 1 male multiple females polyandry: 1 female multiple males polygynandry: multiple females & males Polygynous Temne of Sierra Leone: male reproductive success increasing with the number of females married to male, he has more offspring with more females U.S. Mormons: more wives mean more reproductive success In many culture
More Less

Related notes for PSYC 3100

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.