Subdecks (1)

Cards (15)

  • Procedure:
    • Compared split brain patients to others with no hemisphere separation.
    • Different activities where tried witht he patients including touch of objects and visual presentation of stimuli to see how the different sides perform on tasks.

    Key study - Sperry (1968)
  • Visual tasks
    • A word or picture is projected into the left or right visual field and patient will be asked something about that stimuli.
    Tactile tasks
    • Were carried out with ppts hands underneath a screen so the ppts could not see what they were touching.
    • The had to use ‘feel’ only.
    Key study - Sperry (1968)
  • Independant variable - Cut corpus callosum or uncut corpus callosum.

    Key study - Sperry (1968)
  • Dependant variable - how the ppt behaved.

    Key study - Sperry (1968)
  • Findings:
    • Left visual field, left hand.
    • They could select the object because it was seen by the right hemisphere.
    • They could not speak about the object.

    Key study - Sperry (1968)
  • Findings - recognition by touch:
    • Left visual field, right hand.
    • If the left hand picked up the right hands object, it would be rejected.
    Key study - Sperry (1968)
  • Conclusions:
    • Hemispheres of the brain process information separately.
    • Hemispheres do have different functions supporting lateralisation.
    • Two separate streams of consciousness with their own memories and perceptions.

    Key study - Sperry (1968)
  • Findings - Composite words:
    • If two words were presented simultaneously, one on either side of the visual field.
    • The patient would say one word but write the other with their left hand.
    • This is because the left hand is controlled by the right hemisphere, collecting information from the left visual field.

    Key study - Sperry (1968)