Biological: Sperry

Question 1

background

Answer 1

> Broca’s area- evidence of localisation and lateralisation
contralateralisation- right hemisphere received info from left side of body and vice versa

Question 2

aim

Answer 2

to prove each hemisphere has an independent stream of conscious awareness and has its own chain of memories that aren’t accessible to the other

Question 3

experimental method

Answer 3

quasi

Question 4

IV

Answer 4

split brain or not

Question 5

DV

Answer 5

pps performance on visual and tactile tests

Question 6

sample

Answer 6

11 pps with corpus callosum severed due to severe epilepsy
female with surgery from 4 years ago and a male with surgery 5.5 years ago

Question 7

equipment used

Answer 7

tachistoscope

Question 8

procedure on visual test

Answer 8

> pps stare at a fixation point on centre of an upright screen
stimuli projected for 0.1s to one visual field

Question 9

procedure on tactile test

Answer 9

> pps put hands through gap underneath the screens out of sight
objects placed on one or both hands

Question 10

visual test results

Answer 10

> info shown to one visual field only recognised by same visual field
info shown to RVF can be described in speech and writing with right hand
info shown to LVF pps say “don’t know” but could point to matching pic using left hand
if shown different stimuli to each visual field pps will say what was shown in RVF and draw stimuli from LVF with left hand

Question 11

results from tactile test

Answer 11

> objects placed in right hand can be described in speech and writing
objects placed in left hand lead to wild guesses from pp
objects placed in one hand are recognised by same hand
if an object is placed in both hands, each hand will separately search for own item

Question 12

conclusions

Answer 12

> split brain patients lack cross-integration
split brain patients have 2 independent streams of consciousness