Section B: Relationships Flashcards
What is sexual selection?
It explains why some characteristics that might appear disadvantageous actually are an advantage in human reproductive behaviour, these are attractive to potential mates cause they provide an advantage for reproductive rights.
Define Anisogamy.
Refers to the differences between male and female sex cells (gametes).
How are male gametes?
Small, tiny mobile, continuous production and take very little energy to make.
How are female gametes?
Large, static, limited in number, take lots of energy to make.
Mate selection.
No shortage of fertile males but fertile women are a rare ‘resource’.
Females are more choosy - they need to make sure they get the right mate.
What are partner preferences?
There are 2 types of sexual selection (mating strategies): intra-sexual selection and inter-sexual selection.
What is Inter-sexual selection?
Between the sexes - strategies male and females use to select one another.
What is Intra-sexual selection?
Within each sex - strategies used by men to be the one that is selected.
Which mating strategy is preferred by women, why?
Inter-sexual selection - quality rather than quantity because they have limited time so they need to make sure they get the right one.
What is a female’s optimum mating strategy?
To select a genetically fit partner who is able and willing to provide resources.
Which psychologist developed the Sexy Son Hypothesis and the Runaway Process?
Fisher (1930)
What does the Runaway Process suggest?
It’s the female’s preference for a fit male that determines which feature is passed on to the offspring.
E.g. height
Explain the Sexy Son Hypothesis.
A female mates with a mate that has a desirable characteristic, and this ‘sexy’ trait is inherited by her son. This increases the likelihood that successive generations of females will mate with her offspring.
Which mating strategy is preferred by males, why?
Intra-sexual selection - quantity over quality, refers to the competition between males to be able to mate with a female.
Give and example of a behavioural and psychological consequence of intra-sexual selection.
For males to acquire fertile females and protect them from competing males, they may benefit from behaving aggressively and perhaps even thinking in a certain way.
What is the male’s optimum reproductive strategy?
To mate as many fertile females as possible, because of the continuous production, there’s no limit.
According to the sexual selection theory, how are the mates females look for?
Older males with wealth and resources.
According to the sexual selection theory, how are the mates males look for?
They look for youth and physical attractiveness, signs of good health, sign of fertility and reproductive role.
Evaluation of sexual selection theory.
Limitation
This theory ignores cultural differences. Partner preferences are influenced by rapidly changing social norms of sexual behaviour. Women’s greater role in workplace means they are no longer dependant on men and, therefore may no longer have a resource-orientated mate preference.
Evaluation of sexual selection theory.
Research support - Buss (1989)
He carried out a survey of over 10,000 adults in 33 countries, asking questions on the attributes a person preferred in their partner. He found that females placed greater value on resource-related characteristics and males valued reproductive capacity.
Evaluation of sexual selection theory.
Research support for inter-sexual selection - Clark and Hatfield (1989)
Male and female psychology students were sent out across a university campus, they approached other students asking if they would go to bed with them. No female student agreed, whereas 75% of males did.
This suggests females re choosier than males when it comes to selecting sexual partners.
Evaluation of sexual selection theory.
Research support - Singh (1993,2000)
What matters in male preference is not that female size as such but the ratio of waist to hip sizes. As long as the ratio is about 0.7 up to a point, this will be attractive to a male.
(it signifies that the women is fertile but nor currently pregnant)
Evaluation of sexual selection theory.
Research support - Waynforth and Dunbar (1995)
They studied lonely hearts advertisements in American newspapers. They found that women more than men tended to offer physical attractiveness and indicators of youth, men tended to offer resources.
Which 3 factors affect attraction?
- Self-disclosure
- Physical attractiveness
- Filter theory