Relationships Flashcards
(138 cards)
Summarise Darwin’s (1859) theory of Natural Selection
- Natural selection influences the way that species change over time and become increasingly better adapted to their environment
- Any characteristic that maximise an individual’s ability to survive and reproduce successfully are highly adaptive and likely to be ‘naturally selected’
- Individuals with these genes go on to form successive generations
What is sexual selection?
- A view that competition for mates between individuals of the same sex affects the evolution of certain traits
- If a characteristic increases the individuals chance of reproduction, this characteristic will be adaptive because the animal will have more offspring
What are the two types of sexual selection?
Intra-sexual selection
Intersexual selection
What is in Intra-Sexual selection?
- When members of one sex (usually male) compete with each other for females
- The winners get to mate, and the loser’s genes are not passed on
Trivers (1972) -> Intra-Sexual Selection
According to Trivers (1972)…
- When females invests considerably more than males, members of the male latter will compete among themselves to mate with members of the former females.
What is Intersexual Selection?
- The battle of the sexes
- The preference of females for member of the male sex who possess certain qualities (height, aggression, muscular) etc.
- Thus women will be more discriminating than men in their choice of sex partner because the consequences of mating with an unsuitable partner are greater
What did Fischer (1930) say about intersexual selection?
- The sexy son hypothesis
- Found that we have seen overtime an increase in height of males (a distinguished male quality)
What did Noe and Hammerstein (1995) say about intersexual selection?
- Genes that show attractive features are more ‘saleable’ according to the biological market place explanation
Why sexual selections?
- Males reproduce sperm in thousands at relatively little physiological cost (its quick and easy)
- Therefore, their best stratergy is to mate with many females, becuase this should result in the maximum number of offspring
- Women need to be choosey with who they reproduce with as they have a limited supply of eggs and years of fertility, they also undergo a physiological cost of being pregnant
Referring to Anisogamy, explain the difference in the level of investment in reproduction
- Men are more likely to have a high number of short relationships as it is in their best interest to have sex with as many females as possible to pass their genes on and they also can’t get pregnant so have no physiological costs
- A women is more likely to have a small amount of long relationships, as they have a limited supply of eggs, so want quality of male traits
SUMMARY:
- Male -> Quantity
- Female -> Quality
What is the research supporting inter-sexual selection?
Clark and Elaine Hatsfield (1989)
What is Anisogamy?
Refers to the difference between males and females’ different sex/reproductive cells
Explain the research on Clark and Elaine Hatsfield (1989)
- Clark and Elaine Hatsfield (1989) showed that females choosiness is a reality of heterosexual relationships
- Male and female psychology students were sent out across a university campus
- They approached other students individually with this question, “I have been noticing you around campus. I find you to be very attractive. Would you go to bed with me tonight?”
- Not a single female student agreed to the request, whereas 75% of males did, immediately
- This supports evolutionary theory because it suggests that females are choosier than males when it comes to selecting sexual partners and that males have evolved a different strategy to ensure reproductive success
- However sample is not very representative and western society focused
What is the Research support from lonely hearts research?
Waynforth and Dunbar (1995)
Explain Waynforth and Dunbar (1995)
- Waynforth and Dunbar (1995) studied lonely hearts advertisements in American newspapers.
- These slightly quaint historical documents were opportunities for men (usually) and women to describe the qualities they desire in a potential partner, whilst cataloguing what they had to offer.
- The researchers found that women more than men tended to offer physical attractiveness and indicators of youth (’flirty, exciting, curvy, sexy’).
- Men, on the other hand, offered resources more than women did (’successful, fit, mature, ambitious’) and sought relative youth and physical attractiveness.
- However, Lack of temporal validity but can still be applied to dating apps/social media also was western society focused
What is the relationship support for preferences related to anisogamy?
David Buss (1989)
Explain David Buss (1989)
- David Buss (1989) carried out a survey of over 10,000 adults in 33 countries
- He asked question relating to age and a variety of attributes that evolutionary theory predicts should be important in partner preferences
- He found that female respondents placed greater value on resource related characteristics, such as good financial prospects, ambition and industriousness, than males did
- Males valued reproductive capacity in terms of good looks and chastity, and preferred younger mates, more than females did
- These findings reflect sex differences in mate strategies due to anisogamy. They support predictions about partner preference derived from sexual selection theory
- Furthermore, the findings can be applied across vastly different cultures, reflecting fundamental human preferences which are not primarily dependent upon cultural influences
Outline and briefly discuss the relationships between sexual selection and human reproductive behaviour (8 MARKS)
AO1
Sexual selection is a view that competition for mates between individuals of the same sex affects the evolution of certain traits. If a characteristics increases the individuals chances of reproduction, this characteristic will be adaptive because the animal will have more offspring. For example characteristics in males include strength, height, facial hair which highlight the aspects of maturity and protecting. An example in women is wide hips and it shows how the females are fertile. There are two types of sexual selection, intra-sexual and intersexual. Intra-sexual selection is where males compete with each other for female attention, to obtain the desired genetics for their offspring whilst also passing on their own. Intersexual is where females have the choice of males to mate with, wanting to obtain males who possess certain genetic qualities. Anisogamy refers to the differences between males and female have different sex/reproductive cells, because of anisogamy there is a difference in the level of investment in reproduction. This highlights that females look for quality as they only have a limited supply of eggs and fertile years, whereas males look for quantity as they reproduce sperm in thousands at very little physiological cost.
AO3
Clark and Elaine Hatsfield (1989) showed that females choosiness is a reality of heterosexual relationships. Male and female psychology students were sent out across a university campus. They approached other students individually with this question, “I have been noticing you around campus. I find you to be very attractive. Would you go to bed with me tonight?”. Not a single female student agreed to the request, whereas 75% of males did, immediately. This supports evolutionary theory because it suggests that females are choosier than males when it comes to selecting sexual partners and that males have evolved a different strategy to ensure reproductive success. However the sample size is not very representative as it is only university students taken in the United States, this makes the study hard to generalise across the world, which is an example of ethnocentrism.
David Buss (1989) carried out a survey of over 10,000 adults in 33 countries . He asked question relating to age and a variety of attributes that evolutionary theory predicts should be important in partner preferences. He found that female respondents placed greater value on resource related characteristics, such as good financial prospects, ambition and industriousness, than males did. Males valued reproductive capacity in terms of good looks and chastity, and preferred younger mates, more than females did. These findings reflect sex differences in mate strategies due to anisogamy. They support predictions about partner preference derived from sexual selection theory. Furthermore, the findings can be applied across vastly different cultures, reflecting fundamental human preferences which are not primarily dependent upon cultural influences
What is self-disclosure?
- The idea that relationship formation is built on trust with another person, which is demonstrated by gradually revealing personal information, such as thoughts, feelings and experiences that they might share with anyone else.
- As a result leads to more satisfaction in a relationship
Name and describe the metaphor used to describe the social penetration theory
- Onion Metaphor
- As breadth and depth increase, romantic partners become more committed to one another. We disclose a lot of information about ourselves at the beginning, but it is mainly ‘low risk information’, the the top layer of an onion
- The breadth of disclosure is narrow as we might threaten the relationship with too much information
- The deeper the relationship goes, the more layers are peeled back, thus revealing more about ourselves
What did Reis and Shaver (1988) say about self-disclosure?
- For a relationship to develop, there has to be a balance of self-disclosure between partners
- Instead of one sharing and one listening, there needs to be an even exchange in return
- This could to greater intimacy and a deeper understanding of the romantic relationship
What did Hass and Hartford (1998) say about self-disclosure?
- 57% of gay men and women said that open and honest self-disclosure was the main way they maintained and deepened their committed relationship
- Self-disclosure research allows for individuals to improve on their own personal relationships
Who conducted the study of reciprocal self-disclosure in relationships?
Sprecher et al (2013)
Describe the study done by Sprecher et al (2013)
Sprecher et al (2013) investigated the role of reciprocal self-disclosure in relationships. 156 American University students, female-female or male-female dyads in a Skype conversation.
- Condition 1 → Self-disclosure in a reciprocal manner, taking turns to ask questions
- Condition 2 → Self-disclosure was not reciprocal, one disclosed while the other listened
Condition 1 participants reported a greater liking, closeness, similarity and enjoyment to one another compared to condition 2. Reciprocity of self-disclosure has positive outcomes for romantic relationships