Biological Approach

Question 1

Main assumptions

Answer 1

Physiology and biology are the root of al behaviour

Question 2

Genetic bias is for behaviour

Answer 2

23 pairs of chromosmes inherited from parents and these are and are up of dna and genes genes carry instructions for physical traits and psychological traits

Question 3

What an affects these characteristics

Answer 3

The interaction between other genes and the environment

Question 4

Define genotype

Answer 4

Individuals genetic makeup

Question 5

Define phenotype

Answer 5

Physical apparent or psychological traits that results fro interactions between genotype and the environment

Question 6

What type of students are used to show the influence of genes

Answer 6

Twin studies

Question 7

concordance rate of MZ twins

Answer 7

100%

Question 8

How does win studies help us

Answer 8

They compare concordance rates of MZ and DZ twins for a particular trait, assumption that twins share same environment, difference between concordance rate for MZ and DZ twins tell us how much influence genes have on the trait

Question 9

Natural selection explain behaviour

Answer 9

Proposed by Darwin
- stages that ant genetic material that can aid a individuals survival passed onto their offspring with the effect that only those with the alleles that allowed this behaviour will survive and reproduce passing on their genes

Eg. Attachment seeking proximity to their primary caregiver

Question 10

Nervous system influence behaviour

Answer 10

Behaviour is a result of the CNS sending electrical messages to muscles, glands etc to influence a particular response

Question 11

Endocrine system and glands influence behaviour

Answer 11

Nervous system can send signals to glands to release blood streams which then have effects on our behaviour eg flight or fright Response

Question 12

Weaknesses

Answer 12

• twin studies are used to determine biological basis for a behaviour it’s hard to separate nature vs nurture twins often experience same environments so determining the cause of their behaviour can be hard MZ twins tend to be treated more similarly than DZ difficult to insure concordance rate was definitely due to gentics
• assumes causality where there may only be correlation for Examples low serotonin levels found in individuals with depression this approach assumes low levels of serotonin cause depression but there are individuals with low serotonin who do not experience depression indicates correlation but not causality

Question 13

Strengths

Answer 13

• scientific and objective methods of investigation means theories devolved from these are based of reliable data and more likley to be valid
• treatment implication successful drug treatments have been developed via the biological approach eg antipsychotics to treat schizophrenia