when picture presented to right visual field. patients could describe what they saw. when presented to the left visual field couldn't describe.
Sperry: Tactile Tests?
object in r. hand the ppts could describe verbally. when object in l.hand ppts couldn't describe, left hand could identify there was an object there.
Sperry: Drawing?
when picture shown to right hand visual field the picture drawn was not good and unclear. when picture shown to the left hand visual field the picture drawn was much clearer.
Sperry conclusions?
Right hand side is better in visual motor tasks. Left hand side is better in language production.
Evaluation split brain?
Rogers et al (2004) found in chickens they were able to carry out 2 tasks simultaneously. using 1 hemisphere allows the other to engage in functions
Rogers et al (2004)?
animal study. idiographic
Szafrarki et al(2006)?
language becomes more lateralised with age in children and young adults. after 25 lateralisation decreased with each decade.
Turk et al (2002)?
patient who suffered damage to the left hemisphere was able to shift language production to the right hemisphere. lateralisation is not fixed
Criticism?
studies include very few participants- research is idiographic. Conclusions are representative only of those individuals results cannot be generalised.
