relationships Flashcards
define natural selection
in context with its impact in driving partner selection
- Human behaviour is driven by the need to survive and reproduce.
- certain traits are favoured and increase in the gene pool because they enhance survival and reproductive success.
define evolution
- the process of adaptation through natural selection
what is sexual selection?
-selecting characteristics (e.g. physically attractive) that increase reproductive success
define intra-sexual selection
- refers to mate competition where members of the same sex (often males) compete with one other for members of the opposite sex
- leads ot male-female dimorphism
define male-female dimorphism
- different secondary sexual characteristics that both genders possess.
Define inter-sexual selection
- one sex chooses which members of the opposite sex to mate with
- usually females choosing
Define Anisogamy
- difference between the nature and amount of gametes: male and female sex cells.
- Egg vs sperm
What do males and females select for with regards to physical attractiveness
- males seek indicators of health and fertility: - large waist to hip ratio (around 0.7) , small waist (not carrying another man’s child) and rosy cheeks.
- females: seek characteristics linked to dominance - V Shaped Chest, tall and healthy.
- Both value facial symmetery as it is the best predictor of body symmetry with women seeing males with symmetry as having genetic precision
Name the male strategies used to attract females.
- courtship behaviours
- size
- sperm competition
- male guardging
- sneak copulation
Give research which supports symmetry as a quality of physical attractiveness
Cartwright (2000): Supported Langlois and Roggman who used computer composite images, by finding that men prefer symmetrical faces in women, further linking symmetry to attractiveness.
Describe:
- courtship behaviours
- size
male strategies
- Courtship behaviour: allow males to display genetic potential, through characteristics and resource abilities.
- Size: males evolved to be bigger , demonstrating strength for success in competition against other males.
Describe:
- sperm competition
- mate guarding
male strategies
- Sperm Competition: natural selection acted on males, making them more competitive by producing larger testicles, bigger ejacultions and faster swimming sperms.
- Mate Guarding: Males fear being cuckolded (where another males gets their partner pregnant) and spending resources raising another male’s on and remain child so keep an eye on remain close to their female partners ( link to Kosh and Buss)
Describe sneak copulation
male strategies
- males mate with females other than their partners if given the oppurtunity as it increases their chances of reproductive success.
Give the female relationship strategies
- Sexy Sons hypothesis
- Handicap Hypothesis
- Courtship
What is the sexy sons hypothesis?
Sexy Sons hypothesis: females select attractive males as they will produce sons with the same attractive features, increasing their sons’ and thus their own reproductive fitness.
What is the handicap hypothesis?
Handicap Hypothesis: Zahavi (1975) beleives females select males with handicaps because it advertises ability to thrive despite handicaps , demonstrating superior genetic quality. This may explain females finding those who drink or take drugs as attractive.
what are female courtship behaviours?
- display cues of fertility and health, such as youthfulness and physical attractiveness,
- women may increase their desirability to potential partners
Describe Koch’s research on sex differences in jealousy
- aimed to test Buss’s (1992) belief that males fear sexual infedelity more , while females fear emotionally infidelity more.
- Sample: 100 male and 100 female German university students.
- Participants imagined 4 scenarios involving both emotional and sexual infidelity.
- Scenario 4: asked participants to choose which aspect made them more jealous: Deep emotional relationship Vs Passionate sexual relationship
- Responses and decision times were recorded.
Outline Koch’s findings and evaluate the research
findings:
- Both sexes showed more jealousy over emotional involvement.
- 37% of males vs. 20% of females selected sexual infidelity as causing more jealousy.
Conclusion:
- Men react faster to sexual infidelity, while women react faster to emotional infidelity, supporting evolutionary theories of jealousy.
Evaluation:
- Refutes previous studies suggesting women’s decision-making about emotional infidelity is more elaborate than men’s.
- Does not clarify how men process emotional infidelity decisions.
Outline 4 pieces of research on evolutionary explanations for partner preferences.
- Buss (1989): Found that across 37 cultures, men prefer young, attractive women, while women prefer men with resources, ambition, and industriousness. This suggests that gender-based attractiveness preferences are biological.
- Davis (1990): Conducted a content analysis of personal ads and found that men seek health and attractiveness (44%) while offering wealth, and women (25%) seek resources and status while offering beauty. - strategies
- Dunbar (1995):Analyzed 900 personal ads from US newspapers, showing that men prioritize youth and attractiveness more than women.
- Swami & Furnham found that the optimum waist to hip ratio of 0.7:1 correspons closely to supermodels which in Singh’s research was a consistent feature in female attractiveness.
Evaluate the research on evolutionary explanations (EE) for partner preferences
- the EE presumes heterosexuality and that al relationships are sexual: it is therefore oversimplifed and cannot explain long distance romantic relationships. It also cannot explain cuples choosing not to have children , as it assumes all relationships are motivated by a desire to reproduce.
- Diamond (‘92): beleives males especially in early adulthood, use drugs and risky behaviours, to advertise their reproductive fitness in the face of adversity, providing support for the handicap hypothesis.
- Younger males sometimes desire substantially older women, this goes against evolutionary theory, but may occur due to males wanting to mate with demales proven to be fertile.
- Women do not need men in the way they once did and as predicted by evolutionary theory. Females have greater financial security and employment oppurtunities , and this has occured simultaneously with a rise in single women having children.
Outline an evolutionary explanation for partner preferences. Explain one limitation of an evolutionary explanation for partner preferences. (6)
- partner preference / mating strategy is driven by sexual selection
- males / females choose partner in order to maximise their reproductive success (Inter and Intra sexual selection)
- characteristics that maximise reproductive success are more likely to be passed on to subsequent generations
- so partner preferences evolve in a population
- examples of male / female strategies, e.g. courtship rituals, mate-guarding etc.
eval: - use of evidence to refute evolutionary theory
- evolutionary theory cannot explain non-heterosexual relationships as easily
- theory is less relevant where women have a more independent role in some modern societies
- societal and cultural changes such as availability of contraception mean that evolutionary pressures are less relevant.
Name the factors affecting attraction in romantic relationships
- self disclosure
- physical attraction
- filter theory
Describe self-disclosure
- the revealing of personal inforamtion about oneself to another.
- SD develops a closer, more intimate romantic relationship.
leading them to be seen favourably as likeable, trustworthy and kind.