Biological approach

Question 1

Assumptions

Answer 1

Everything psychological is at first biological
The mind and body are one and the same - contracts cognitive approach

Question 2

Neurochemicals

Answer 2

Thought and behaviour depend on chemicals - neurotransmitters

EG - low levels of serotonin in OCD, high levels of dopamine in schizophrenia

Question 3

Genetics

Answer 3

Concordance between MZ & DZ shows genetic basis of psychological characteristics

MZ = identical, 1 egg

Question 4

Genotype & Phenotype

Answer 4

Genotype - particular set of genes that a person possesses. Actual genetic makeup

Phenotype - characteristics of an individual determined by genes and the environment. The way genes are expressed through physical, behavioural and psychological behaviours

Despite having same genes, identical twins phenotype is different
EG PKU can be prevented by restricted diet
Shows behaviour depends on interaction between inherited factors (nature) and environmental factors (nurture)

Question 5

Evolution

Answer 5

Natural selection of genes based on survival value & reproductive success

More likely to survive = reproduce and pass on these traits

Question 6

Strengths

Answer 6

• Real World Application
  Understanding biochemical process with development psychoactive drugs
  Treats mental disorders - antidepressants - inc serotonin levels
  Means people with depression may be able to better manage conditions
• Scientific Methods
  Precise & objective methods - fMRI, EEGs
  Means much of biological approach is based on objective and reliable data