RELATIONSHIPS Flashcards
Define natural selection
Suggests characteristics that confer a survival advantage are passed on to produce offspring with the best genes. This is because these characteristics are adaptive and therefore individuals with these characteristics are more likely to survive and be able to reproduce.
Define sexual selection
Suggests that characteristics that confer a reproductive advantage are passed in to produce offspring with the best genes. This is effectively ‘survival of the sexiest’. In sexual selection, an individual’s survival is not at stake, but rather their ability to leave more descendants.
What is human reproductive behaviour
Any behaviours that relate to opportunities to reproduce and therefore increase the survival changes of our genes
Define anisogamy
The difference between male and female sex cells. This means that there will be more fertile men than women at any given time (sperm are continuously created in vast numbers whereas ova are produced for a limited number of fertile years). As such, men and women have different strategies to maximise reproductive success.
What is inter-sexual selection and what gender uses this?
Where traits increase ‘attractiveness’ and/or induce members of the opposite sex to mate with them. Women evolve preferences for desirable qualities in potential mates to have the highest quality offspring.
What is intra-sexual selection and what gender uses this?
Where traits allow an individual to compete with members of the same sex for access to mating opportunities. Men compete to be able to mate with the fertile women (they compete to be chosen)
Based on anisogamy, why are women choosy about who they mate with?
Females make greater investment in terms of time, commitment and other resources before, during and after the birth of her offspring.
What characteristics do women prefer in men?
A genetically fit partner who is able and willing to provide resources
Based on anisogamy, why are men less choosy about who they mate with?
Men mate with as many fertile females as possible. This is because of the minimal energy required to produce sperm and the relative lack of post-coital responsibility.
What characteristics do men prefer in women according to the sexual selection theory?
Youth and sensitivity to the indicators of youth and fertility as these are signs of reproductive value.
How do preferences and reproductive behaviours get passed down according to the sexual selection theory
This results in an increased probability that they will reproduce and pass on their genes
Give a piece of supporting evidence for sexual selection theory (C and H)
Clarke and Hatfield sent male and female psychology students across a uni campus. They approached other students individually with this question: ‘I have been noticing you around campus. I find you very attractive. Would you go to bed with me tonight?’ Not a single female student agreed to the request, whereas 75% of men did, immediately. This reflects sex differences predicted by anisogamy and supports the predictions derived from SS about ST mating strategies. Therefore, this supports the validity of the theory as an explanation of reproductive behaviour.
Give a piece of supporting evidence for the sexual selection theory (ratio)
Singh studied the waist:hip ratio in females. He found that what matters in male preference is not female body size as such, but the ratio of waist to hip sizes. Up to a point, males generally find any waist and hip sizes attractive so long as the ratio of one to the other is around 0.7/. This combination of wider hips and narrower waist is attractive because it is an ‘honest signal’ that the women is fertile but not currently pregnant. This suggests that men have an innate adaptive mechanism to identify and prefer women with a low waist:hip ratio as the most attractive as its a sign of reproductive value, increasing their likelihood of reproducing. This supports the validity of the theory as an explanation of human reproductive behaviour.
Give a weakness of the sexual selection theory of relationships
Partner preferences have undoubtedly been influenced by rapidly changing social norms of sexual behaviour. These develop faster than evolutionary timescales, which implies that they came around due to cultural factors. Women’s greater role in the workplace means that they are no longer dependent on men to prove for them. Mate preferences are therefore the outcome of a combination of evolutionary and cultural influences. Any theory that fails to consider both is therefore a limited explanation of human reproductive behaviour and so we can’t argue that the theory is completely valid.
Give a three sentence summary of physical attractiveness theory
Physical attractiveness is thought to be an important factor in the formation of romantic relationships. It usually applies specifically to how appealing we find a person’s face. There exists an assumption that we seek to form relationships with the most attractive person available.
What did Shackleford and Larsen find?
People with symmetrical faces are rated as more attractive. This is because it may be an honest signal of genetic fitness.
What does neotenous mean, why are they attractive?
Baby face features e.g., widely separated and large eyes, a delicate chin and a small nose. People are attracted to people with neotenous features because they trigger a protective or caring instinct.
What is the physical attractiveness stereotype and how does it lead to the self fulfilling prophecy?
This suggests that attractive people are kind, strong, sociable and successful compared to unattractive people. This belief makes them even more attractive to us, so we behave positively towards them (self fulfilling prophecy)
What is the halo effect?
One distinguishing feature of a person (their physical attractiveness in this case), disproportionately influences our judgements of their other attributes (their personality)
What is the second theory of the physical attractiveness theory and what does it tell us about how we are attracted to people?
- Common sense tells us that we can’t all form relationships with the most attractive people. The matching hypothesis suggests that people are attracted to people who approximately ‘match’ us in physical attractiveness
- To do this, we must make a physical judgement about our ‘value’ to a potential partner
- Therefore, our choice of partner is a compromise between desiring the most physically attractive partner possible and avoiding being rejected by someone who is unlikely to consider us physically attractive.
Give a piece of supporting evidence for physical attractiveness theory
Palmer and Peterson found that physically attractive people were rated as more politically knowledgeable and competent than unattractive people. This halo effect was so powerful that it persisted even when ppts knew that these ‘knowledgeable’ people had no particular expertise. The existence of the halo effect has been found to apply in many other areas of life too. This supports that physical attractiveness is an important factor in the formation of relationships. By being physically attractive, it seems that this distinguishing feature disproportionately influences voters’ judgements of the politicians; knowledge and competency. This has implications for the political process.
Give a piece of supporting evidence for the matching hypothesis
Berscheid et al invited male and female ppts to a dance. They were rated for physical attractiveness by objective observers and also completed a questionnaire about themselves. They were then able to select a partner for the dance from people of varying degrees of attractiveness. Ppts tended to choose partners who matched them in physical attractiveness. This suggests that we tend to seek and choose partners whose attractiveness matches our own, acting as a compromise between personality and attractiveness, supporting that physical attractiveness in the form of the matching hypothesis is a valid explanation of attraction.
Give a piece of undermining evidence for the matching hypothesis theory (and a strength of physical attractiveness)
Taylor et al studied the activity logs of a popular online dating website, therefore measuring people’s actual date choices rather than preferences. They found that online daters sought meetings with potential partners who were more physically attractive than them. This suggests that the matching hypothesis may not be a valid explanation of attraction as its central prediction (that people will be more attracted to and so select partners who ‘match’ them in physical attractiveness) is contradicted by these findings.
Define filter theory
An explanation of relationship formation. It states that a series of different factors progressively reduces the range of available romantic partners to a much smaller pool of possibilities. The filters include social demography, similarity in attitudes and complementarity.
Define field of availables (filter theory)
The partners that we see available to us after filtering
Define field of desirables (filter theory)
Filtered down population to who is actually desired/attractive to us. Determined by social demography, similarity in attitude and complementarity.
Define social demography (filter theory)
Demographics are features that describe populations, social demographics include geographical location and social class. Such factors filter out a large number of available partners. This means many relationships are formed between partners who share social demographic characteristics.
Why does social demography make someone attractive
The key benefit of proximity is accessibility. Homogamy - you are more likely to form a relationship with someone who is socially or culturally similar. This is important at the start of attraction