A03

• * evidence to support from peterson?

  • used brain scans to show wernickes area was active during listening task & brocas was active during reading task
  • both lateralised in left hemisphere.
  • empirical evidence for language centres being localised in left
  • particularly brocas & wernickes which validates his findings
• X contradictory evidence from danelli?

  • case study of e.b who had left hemisphere removed at 3
  • made full recovery by 15 & language good as his peers
  • language not strictly lateralised to left.
  • right hemisphere able to recover language function
  • language is not strictly lateralised to left hs
  • sperry findings do not occur in every individual
• X small sample size?

  • only used 11
  • rare & unusual surgery so not alot of available patients
  • surgery no longer done so access to these people is unlikely
  • population
  • ungeneralisable to rest of population
  • all patients had epilepsy so brains different to general population
  • cannot trust that all brains are localised in same way
• X individual differences

  • sperry found some patients experienced more disconnection of 2 hemispheres - lack of control
  • some p able to do tasks better than others as hemispheres slightly connected.
  • he ignored individual differences/ did not investigate fully
  • affected how lateralised different brains appeared