... sample used is too small then it may not be representative of how the average person's brain works and it may make the results less accurate. --Sperry used 11 people who had had their corpus collosum cut due to severe epilepsy. This is a very small sample, especially so because Sperry is saying that, according to those 11 people, that the brain functions in a certain way. The main reason for this small sample is because this is a naturalistic study, so he had to find people that had undergone this major operation and at the time not many people had actually had their commissural fibres cut to such a great extent. Even though the size of sample Sperry used was very small, he still made generalisations about how the human brain works. Research methods that are used, especially lab experiments, may be artificial and unnatural. This means that generalisations cannot be ...

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