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Scenario II
In pioneering research by Sperry and colleagues,split-brain patients were asked to stare at a dot on a screen centered between their eyes while words of common objects were projected onto the screen either in their left or right visual fields.Subsequently,patients were asked to reach behind a screen with either their left or right hands and identify the object amongst other common objects by touch alone.
-(Scenario II)Using the procedure described in the scenario above,split-brain patients were simultaneously shown the word "key" in the left visual field and the word "chain" in the right visual field.They were then asked to reach behind a screen with their left hand and find the object that was projected onto the screen.Among the objects behind the screen are a key,a small chain,a keychain minus the key that one can typically purchase at novelty stores,and a lock.Which object will the patients select?
A)the key
B)the chain
C)the keychain
D)the lock

Question

Use the following to answer questions 
Scenario II
In pioneering research by Sperry and colleagues,split-brain patients were asked to stare at a dot on a screen centered between their eyes while words of common objects were projected onto the screen either in their left or right visual fields.Subsequently,patients were asked to reach behind a screen with either their left or right hands and identify the object amongst other common objects by touch alone.
-(Scenario II)Using the procedure described in the scenario above,split-brain patients were simultaneously shown the word "key" in the left visual field and the word "chain" in the right visual field.They were then asked to reach behind a screen with their left hand and find the object that was projected onto the screen.Among the objects behind the screen are a key,a small chain,a keychain minus the key that one can typically purchase at novelty stores,and a lock.Which object will the patients select?
A)the key
B)the chain
C)the keychain
D)the lock

Quizplus · Accepted Answer

Since the word "key" was shown in the left visual field, it will be processed by the right hemisphere of the brain, which controls the left hand. Therefore, the patient will most likely select the key when reaching behind the screen with their left hand. The other objects presented (chain, keychain, and lock) have no specific left/right visual field association, so they are not likely to be selected based on the hemispheric processing of the visual information.

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