relationships Flashcards
definite sexual selection
explains how evolution is driven by competition for mates, and the development of characteristics that ensure reproductive success
define intrasexual selection
- individuals must outcompete other members of their own sex to gain access to members of the other sex
- successful individuals are able to pass on their genes
define intersexual selection
- individuals evolve preferences for desirable qualities in potential mates
- members of the opposite sex who have these characteristics will then gain a mating advantage over those who don’t
- the preferences of one sex determines the area in which the other sex must compete
what is the rationale behind sexual selection
- good to be picky as the genetic quality of mate will determine half of the genetic qualify of an offspring
- low quality mates = more likely to produce unattractive offspring so pair up with attractive mate and those genes will be passed on
sexual selection means that females are attracted to what sort of mates?
- resourceful
- can physically protect them and child
- show promise of being a good parent
- compatible
however, mates are more attracted to females who show fertility
outline producers and findings of Buss’s study ( evolutionary explanations for partner preferences )
- 10,000 people from 37 cultures
- participants asking to rate characteristics on how important they would be in choosing a mate
- four point scale used from 3 (indispensable) to 0 (irrelevant)
- women more than makes desired mates with good financial prospects
- men placed more importance of physical attractiveness and universally wanted mates who were younger them themselves -increased fertility
- both sexes wanted mates who were intelligent and kind
the evolutionary perspective argues what…
that the preferences,behaviours and relationships of men and women today have their origins in the evolutionary past
natural and sexual selection may explain the differences in what
- what men and women find attractive
- the qualities they seek in partners
- differences in human reproductive behaviours
explain Cunninghams investigation on what males find attractive in females
- investigated what types of female faces are found attractive by males
- systematically varied the size of the female facial features. Used same female face picture but altered features on computer. This acted as a control variable
- found that men were most attracted to features associated with young children - large eyes, small nose etc
- some features associated with maturity such as prominent cheekbones were also found attractive
what did Singh found out about body shape
-men ranked women with a small waist to his ration of around 0.7 (waist 70% size of the hips) as the most attractive and healthy
what did Waynforth find out about what females find attractive in males
- masculine facial features including a square jaw, rigged eyebrows, thin lips were preferred by women, especially those seeking a short term partner
- the ideal waist to hip ratio in makes was around 0.85. Wide shoulders down to narrowing hips
what is found attractive to both females and males ?
- symmetrical faces (Bruce and Young)
- Pawlowski asked a sample of 218 males and females to rank attractiveness of 7 pictures of men and women which were altered in leg length. In both sexes 5% longer than average legs were seen as the most attractive
explain what Buss found in his cross cultural study in partner preferences
- men valued physical attractiveness more than women
- men valued women who were younger than themselves
- women valued financial capacity and qualities that are associated with this (ambition)
what study confirmed Buss’s on partner preferences ?
- Dunbar and Waynforth
- study used 900 personal adverts from North American newspaper
- however, only within one culture so not representative of the whole population
explain Clark and Hatfield’s study on differences in reproductive behaviours
- male and female students approached total strangers of the opposite sex on campus and made a suggestion of sex
- the three requests were: to go out with them that night, to go back to their house with them or to have sex with them
- 50% of men and women agreed to go out with them that night
- none of the women agreed to have sex with a stranger
- 75% of men agreed to have sex
explain the research to support the claim that men tend to seek and desire a greater number of sexual partners than women
- Buss and Schmitt asked how many sexual partners people would want over the next two years, the next decade and during their lifetime.
- men would like 8 partners over the next two years compared to women’s 1 partner
- over a lifetime, 18 for men and 4-5 for women
explain Buss’s study in differences in sexual jealousy
- asked male and female students to imagine their partner either having sex with someone else or in love with them
- they were wired up to measure stress response during this
- men become most distressed at the thought of their partner being sexually unfaithful
- women became most distressed at the idea of their partner in love with someone else
what did Ellis and Symons discover about sexual fantasies and dreams
men are more likely to have sexual dreams than women, especially those involving multiple partners
define anisogamy
the differences between male and female gametes
explain Buller’s argument that female preference for high status men may not be universal
- studies attempting to determine female mate preferences have been carried out on female undergraduate students
- problem with class and age group. Sample doesn’t represent whole population
- these women expect to achieve high educational status and so have expectations of high income levels.
problem with Buss’s study on partner preferences, counter argument and then another problem
- the results expressed preferences instead of what actually happens. This is a problem of self report
- however there is support for Buss from real life. A study of real marriages showed that from 29 cultures men do choose younger women
- consider social desirability of being asked how many partners would be desirable over different time periods. Answers may reflect the social construction of masculinity and femininity.
explain the problem with partner preferences studies that they ignore social and cultural influences
- Bernstein points out that gender differences in mate preferences may result from cultural traditions rather than evolved characteristics
- e.g. the fact that women have been denied economic and political power in many cultures might account for their tendency to rely upon security and economic resources from men
- analysis showed that women valued mates with status and money for more in cultures where women’s status and opportunity were limited
what is the research support for inter sexual selection from Clarke and Hatfield
- showed that female choosiness is a reality of heterosexual relationships
- male and female confederates approached other students on campus with the question ‘I have been noting you around campus, I find you to be very attractive. Would you go to bed with me tonight?’
- not a single female agreed to the request
- 75% of males did
what did Dion and Wheeler and Kim find out about physical attractiveness and stereotypes
- physically attractive people are consistently rated as kind, strong, sociable and successful
- this stereotype is also seen culturally. Wheeler and Kim found that Korean and American students judge physically attractive people to be more trustworthy, concerned for other people.
- the stereotype was just as strong in collectivist cultures as it is in individualist cultures