A03 .

• general strength- scientific and empirical methods of testing-brain scans eg MRIs or lab studies- objective and high levels of control-standardised,replicable,reliability

  
  

  allows for treatment and diagnosis=benefit economy
• general HOWEVER- biologically deterministic, ignores other environmental or external influences, reducing validity and generalisability

  joseph found 40% concordance rates of MZ twins despite sharing 100% dna- talk about interactionist approach/DSM
• AMPHETAMINES- support for dopamine hypothesis, dopamine antagonists so stimulate nerve cells releasing dopamine causing flooding of dopamine in synapses= 'normal' individuals developed positive symptoms
• AMPHETAMINES HOWEVER

  • noll claims strong evidence against dop hypothesis, 1/3 of people taking antipsychotics do not experience a decrease in symptoms+ hallucinations also present in those without high dop levels= reduced validity