biological- sperry and casey et al Flashcards
Q
What are the main functions of the left and right hemisphere of the brain?
A
The lefts role is language, reasoning and logical thought.
The right hemispheres function is creativity, imagination and spacial awareness.
What hemispheres of the brain control each hand?
The right hemisphere controls of the left hand, while the right hemisphere controls the right hand.
What was the aim of Sperry’s research?
To show the independent streams of conscious awareness possessed by each hemisphere and to show how each hemisphere has its own fucntion
What was the research method used in research by Sperry?
Quasi
What was the IV in Sperrys research
IV: having a split brain or not Participants with split-brains had already undergone hemisphere disconnection to reduce severe epilepsy. No
actual control group was necessary for comparison in the study because the functions and abilities of the visual fields and hemispheres in non
split-brain individuals was already known.
What was the DV in research by Sperry?
DV: the participant’s ability to perform a variety of visual and tactile tests
What was the sample Sperry used?
11 patients who had undergone an operation to sever their Corpus Colosseum for treatment of epilepsy.
What was the visual test used?
The participant (with one covered eye) centred their gaze on a screen.
A visual stimulus appeared on the screen from 1/10 of a second, to fast to get the eyes in the wrong visual field.
Everything projected to the left of the screen is passed via
the left visual field (LVF) to the right hemisphere and vice versa.
What was the tactile test used?
Below a screen there was a gape so participants could reach object but not see them.
Objects were placed in either the Ps left or right hand or both hands.
Information about the objects placed in the left hand is processed by the right hemisphere and vica versa.
What is the role of the inferior frontal gyrus?
Part of the brain that is used for control of impulsive behaviour.
