I aim to investigate the effects of hemispheric disconnection on perception and memory!
To do this, I will sample 11 patients, who have had commissurotomies to separate their left and right hemispheres.
In split-brain participants, each hemisphere can perceive and remember information presented only to that hemisphere. Verbal responses were only possible when information was presented to the left hemisphere.
But what does this mean?
I will test them in my laboratory, using apparatus that could display stimuli independently to either their left or right visual field.
They will be required to say, write or find what they have seen. There are other tests such as objects placed either separately or simultaneously in each and, and participants have to find or name them. Manual tests, such as copying hand positions, will also be used.
It means that hemispheric disconnection causes the two hemispheres to operate independently, each having its own consciousness, including perception and memory. This produces a 'doubling' of conscious awareness, as each hemisphere is unaware of the other. The right hemisphere, athough much less lingustic of the left, can use logic.