Hemispheric Lateralisation

Question 1

What are the three AO3 PEELS to evaluate hemispheric lateralisation?

Answer 1

RTS by Sperry - split brain patients
RTC by EB - damage to LH
Discussion - low pop val

Question 2

P
(RTS by Sperry)

Answer 2

RTS - Sperry - using split brain patients with a severed corpus collosum

Question 3

E

Answer 3

• he found that when ppts were shown image of object to RVF, patient could name it verbally
• but when shown object to LVF, they couldnt name it but identify object by pointing

Question 4

E

Answer 4

this supports that the brain is lateralised and hemispheres are responsible for diff functions such as LH being responsible for language abilities

Question 5

L

Answer 5

therefore, split brain research supports the theory of hemispheric lateralisation

Question 6

P
(RTC by patient EB)

Answer 6

Moreover, RTC - case study - patient EB

Question 7

E

Answer 7

he suffered from brain damage that resulted in his LH being removed, therefore his lang centres

Question 8

E

Answer 8

• however, EB eventually managed to regain some of his lang ability
• this wouldnt be possible if the brain was COMPLETELY LATERALISED

Question 9

L

Answer 9

• this shows lang must be in more areas than just LH
• therefore ARGUING AGAINST LATERALISATION OF FUNCTION IN BRAIN

Question 10

P
(Discussion - low pop val)

Answer 10

However, the case study of patient EB can be criticised to have low pop val

Question 11

E

Answer 11

• this is bc it is a unique case study where brain damage may have affected the way in which the brain functions
• so it may not be appr to gen findings on the lat of function to wider pop

Question 12

E

Answer 12

• as some indv may be able to processs lang in right hemisphere
• e.g. some research has found lang is not solely lateralised to LH but is found in dominant hemisphere

Question 13

L

Answer 13

therefore suggesting more research is needed (with more diverse samples) before firm conclusions on the lateralisation of lang is possible