nature v nurture debate Flashcards
(31 cards)
what is this argument about
based on the argument that either genes (nature) or environment (nurture) determine behavior
what is included in the environment
everything outside of our body so influences on behaviour that are non genetic
includes people, events etc
what is included as apart of nature
any influence that is genetic e.g action of genes, neurochemistry, neurotransmitters, neurological structures
hereditary meaning
The process by which traits are passed from parents to their offspring, usually referring to genetic inheritance.
what are some methods of studying nature
Brain scanning e.g. fMRI, EEG
Concordance rates as used in twin studies
DNA analysis via urine or saliva samples
what can be used to determine the extent to which phenotype is determined purely by genotype or by external factors
hereditary coefficient
what does a value of 1 mean
behavior/trait is purely genetic
what does a value of 0.5 mean
half of the behavior/trait is genetic and half is determined by environment
what does a value of 0.1 mean
behavior/traits is not genetic and is determined by environment
whats an example of extreme nature in the course (think attachment)
Bowlby’s theory of attachment is an example of a pro-nature argument as he based his ideas on the work of ethologists such as Lorenz, concluding that attachment is an essential evolutionary mechanism needed for the survival of the species
in terms of nurture, how does learning occur
conditioning based on environmental forces/stimuli
whats an example of research in psychology
conformity to social roles as in the Stanford Prison experiment
behavior emerged from the roles and the environment, not from any inborn traits.
environment nurtured certain behaviors—aggression in guards, helplessness in prisoners.
whats an extreme example
Locke’s ‘blank slate’, ready to be ‘written on’ by life experiences
strength of nature
researchers examine concordance rates that have successfully shown that mz twins have higher cr compared to dz twins suggesting a genetic component
whats evidence of this (think AN)
Holland et al identical twins had 11x the rates of AN than non-identical twins
56%
whys this good- what can be concluded from this
This can lead to early diagnosis, better treatment, or even preventive care for certain conditions.
however…
the absence of a 100% concordance rate, which would be expected if the conditions are purely genetic) implies both genetic and environmental factors play a role
whats a limitation of nature
Can result in prejudiced, overly deterministic, and possibly dangerous assumptions being made about people based on their gender, ethnicity, sexuality etc.
whats a book that showed this happening
The Bell Curve for promoting the idea that IQ is largely genetically determined, and that this determines people’s life outcomes (like success, income, or even criminality).
what can be concluded from this
It also implies that social inequalities are “natural” or inevitable, rather than shaped by systems and structures when there is no empirical evidence to support this
whats a strength of the nurture debate
nurture being a key influence on behavior is evidenced by the two-process model of phobias
explain this
can explain the development of phobias-learned via classical conditioning
(e.g. a dog bite as a child) changes a neutral stimulus (the dog that bit you) into a conditioned phobic stimulus (dogs in general)
Reinforced via operant conditioning
Every time you see a dog you feel high anxiety, fear, panic etc. which only ceases when the dog is out of sight
what can be concluded from this
shows that phobias can develop through personal experience, not genetics.
The conditioning process relies on external events (like trauma or reinforcement), which are all part of the individual’s environment- core to the nurture argument.
Avoidance of the phobic stimulus reduces anxiety (negative reinforcement), making the behavior more likely to continue highlighting the role of learning and experience.
whats a limitation of this
doesn’t account for individual differences between people raised in the same environment