Evaluation

Question 1

What ethics did sperry uphold

Answer 1

Participants were aware of the purpose of the study
The tasks were unlikely to cause harm
The findings are kept confidential and participants not names

Question 2

What ethics did sperry break?

Answer 2

Participants may have been upset to find out they were unable to complete simple tasks
Possible issues of confidentiality

Question 3

Ethnocentrism

Answer 3

Although all participants were from the USA, the study wasn’t ethnocentric. The brain is a natural process and is not impacted by culture

Question 4

Internal reliability

Answer 4

Standardised procedure, participants presented with info in the same way

Question 5

External reliability

Answer 5

General assumption that the way the brain works is universal, so fewer results needed for reliability
Only 11 participants, findings may not be consistent

Question 6

Internal validity

Answer 6

Several controls to try limit extraneous variables (1/10th of a second)
However participants had undergone surgery, those without cannot do the same

Question 7

External validity

Answer 7

The sample contained men and women in some ways diverse
Because of uniqueness of same, may not be representative

Question 8

Ecological validity visual tasks

Answer 8

Lack ecological validity, visual info is normal presented for a longer time and in the centre of vision so participants wouldn’t normally have the same difficulty

Question 9

Ecological validity tactile tasks

Answer 9

More validity, more typically feel for objects with one hand out of sight