Daniel et al

Question 1

D - Aim

Answer 1

To investigate the activity of the brain of schizophrenics, and how stimulants effect it.

Question 2

D - Type

Answer 2

Lab/field experiment.

Question 3

D - Design

Answer 3

Repeated measures.

Question 4

D - Hypothesis

Answer 4

Those on amphetamines would perform better on a cognitive task.

Question 5

D - Sample

Answer 5

10 schizophrenia sufferers from wards in the USA.

Question 6

D - IV

Answer 6

Whether participants were given the amphetamine or the placebo.

Question 7

D - DV

Answer 7

How well they performed on the cognitive task.

Question 8

D - Procedure

Answer 8

All participants were stabilised on medications. They performed a control task and a cognitive task - the Wisconsin Card Sorting Task while having their brains measured using a SPECT scan. On two separate days, the conditions were repeated with either a placebo or an amphetamine, they were unaware of the placebo.

Question 9

D - Results

Answer 9

There were significant differences between the two conditions while performing the WCST, amphetamines increased prefrontal cortex activity.

Question 10

D - Conclusion

Answer 10

The experiment supported the Biological Theory, amphetamines stimulate dopamine, and cognitive ability.

Question 11

D - Criticisms

Answer 11

Sample size was too small, tasks were artificial, drugs may cause extraneous variables, ethical concerns with brain scanning, findings are outdated, and they ignore the role of nurture.