Hemispheric Lateralisation

Question 1

What does contralateral mean

Answer 1

Left hemisphere controls the right side of the body and vise versa

Question 2

What does the corpus collosum do

Answer 2

. Connects 2 parts of brain together
. Cut to help people with epilepsy

Question 3

What was Sperry and Gazzaniga aim

Answer 3

Examine the extent to which the 2 hemispheres are specialised for certain functions
(When info presented to 1 hemisphere in split-brain patient, info isn’t transferred to other hemisphere)

Question 4

Method of Sperry and Gazzaniga research

Answer 4

. An image/word projected to patients left visual field (processed by right) or vise versa

Question 5

What were the factors within Sperry and Gazzaniga experiment

Answer 5

Describe = pic presented to either left/right visual field and participant had to describe what they see

Tactile = object placed in participants hand and had to describe what they see and select similar object from alternate objects

Drawing = presented with pic in left or right visual field and had to draw what they see

Question 6

Results (Describe)

Answer 6

Left = could describe what they saw - superiority in language production
Right = could not describe what was shown

Question 7

Results (Tactile)

Answer 7

Left = verbally describe what they felt. Could identify object in right hand by selecting similar object

Right = couldn’t describe object - could identify object in left hand by seeking similar objects

Question 8

Results (Drawing)

Answer 8

Left = picture from right-hand not as clear as left hand

Right = Would attempt to draw pic but not as clear

Question 9

Research Evaluation

Answer 9

. High internal validity
. High reliability

. Demand Characteristics
. Felt abnormal
. Low ecological validity