Evolutionary Explanations Of Attraction Flashcards
(36 cards)
An important time in human evolutionary history is thought to have been the period between …
40,000 and 10,000 years ago, during this period humans lived a hunter gatherer lifestyle. Tasks that were essential for survival were made easier for the individual who lived in a small social group.
What does evolutionary psychology suggest
Behaviours we see in people today have their origins in the past and exist because they conveyed advantages to our distant ancestors.
Who proposed the theory of natural selection
Darwin, according to the principle of natural selection members of a species vary in appearance (morphology)and in behaviour.
Within any environment members of a species compete for access to physical resources and shelter and attempt to avoid danger from predators
What does natural selection propose
If a variation in behaviour of morphology produces an advantage in this competition, this should enable that individual to survive more successfully than those who do not possess that feature or behaviour
What is the process of natural selection
Some individuals have better characteristics
These become stronger and healthier fitter
They therefore have more offspring
The next generation has a higher proportion of the better characteristics
Many many generations later the whole species has changed to the new form
Sexual selection
Survival of the fittest is not just about who is the strongest, fiercest. It can be based on who is the healthiest, smartest or best looking individual that can out reproduce their competitors
What does costly signalling mean
Sexually selected signals must be costly for survival. The ability of the bearer to express the signal acts as a guide to overall quality of the mate
An observational study conducted by Lycett and Dunbar on sexual selection found that…
Watching and recording ways men and women used phones in cafes and cars. Women kept their phones in their bags - hidden like their fertility and the ability to reproduce.
Men placed theirs on the table in front of them displaying for the world to see - displaying their resources to everyone
What does INTRA-SEXUAL mean
Takes place when members of the same sex (often males) compete for access to mates of the opposite sex in various ways including fighting
Characteristics that make a male more successful in a fight are likely to be passed to any offspring.
What does INTER-SEXUAL selection mean
Occurs when members of one sex often females prefer members of the opposite sex based on certain qualities
Females may choose a mate because they appear healthy and will pass on good genes, because they will protect and help raise offspring and they find certain characteristics sexy
There are differences in what men and women are looking for in a potential partner. What do men and women look for…
Men tend to compete more for access to mates and are less choose than women about qualities of the potential partner.
Women want it all, tall, good looking, kind, funny, Intelligent, wealthy, powerful mates
What did Buss 1989 find about sexual selection and the differences in what men and women look for in a potential partner
Across 37 cultures, Buss found women rated having resources as more important in mate choice than men do
Men rated physical attractiveness which is an indicator of youth and fertility as more important in mate choice than women do
Personal ads as a naturalistic way of studying mate choice
Can assess content of the ads posted by real people to determine, which characteristics individuals seek in a mate, the type of relationship they are seeking. Characteristics the individual uses to describe their own qualities.
Downside of using this method is unable to determine success rates. Research on speed dating could overcome this limitation
What are the similarities between men and women’s sexual behaviour
Both men and women have short term relationships
Both men and women form lasting relationships in which they can produce and raise offspring
Both fall in and out of love and experience sexual jealousy
Men tend to seek and desire greater numbers of sexual partners and more likely to use pornography or pay for sex. Buss and Schmitt study showed
Asking a sample of 75 men and 73 women how many partners they would ideally like over a series of time interval.
At each time interval men expressed a preference for significantly more partners
Men tend to be much more likely to have one night stands than women. What did Clark and Hatfield find
A sample of attractive male and female students approached total strangers of the opposite sex and propositioned them saying I find you very attractive followed by
- would you go out with me tonight 50% both men and women
- would you come over to my apartment 69% men said yes, 6% women
- would you have sex with me 75% of men said yes , Zero said yes For women
What are the differences in jealousy between men and women
Buss et al asked male and female students to imagine their current boyfriend or girlfriend having sex with someone else or in love with the, and asked which distressed them most. More women were distressed by emotional betrayal
Men were more distressed by sexual infidelity
What does parental investment mean
Any investment by the parent in an individual offspring that increases the offspring chances of surviving at the cost of the parents ability to invest in other offspring
What does Trivers central argument suggest
The sex who invested the most in the offspring should be more choosy and discriminating in their choice of partner and the sex who invested least should complete more vigorously with other members of the same sex for access to mates.
Why are men different to women in terms of parental investment
Men have large amounts of sperm and retain fertility throughout their lives unlike women who cease to be fertile after menopause. Men are capable of many matings the only limit to the number of offspring they can produce is the number of available partners they can persuade to have sex with them
Why is females investment in offspring substantial
She has a limited supply of 1 ovum per month.
Female reproductive life is shorter limiting the number of offspring she can produce
She carries the foetus for 40 weeks feeding it from her own supplies of nourishment
She has to give birth and continue to invest in the baby for many years to ensure survival
In which animal is the role of parental investment reversed
Male Panamanian poison arrow frogs invest more in bringing up offspring than the female. Female frogs are large and aggressive and compete for males who are choosy
Trivers theory can help explain why men are generally more likely to engage in short term sexual relations.
They require little investment and effort for males
They increase reproductive success of males
Females are less attracted as they do not display commitment in helping raise offspring
What is a limitation of PARENTAL INVESTMENT THEORY
Ignores the evidence that women do engage in short term relationships
It also tells us little about homosexual relationships which are non-reproductive