experimental design

Question 1

independent group design ?

Answer 1

• 2 separate groups of ps experience 2 different conditions of the experiment
• all ps experience 1 level of the IV
• peformance is then controlled

Question 2

repeated group design ?

Answer 2

• all ps experience both conditions of the experiment
• each p experiences condition A and then would late be tested again in condition B
• 2 mean scores from both conditions would be then compared

Question 3

matched pairs design ?

Answer 3

• ps are paired together on variables relevant to the experiment
• e.g matched based on IQ
• then 1 person from each pair would b allocated to a different condition
• then same as independent design

Question 4

strengths of independent group design ?

Answer 4

• order effects are not a problem
• ps are less likely to guess the aims

Question 5

strengths of repeated measure design ?

Answer 5

• participant variables are controlled so higher validity
• fewer ps are needed (less time consuming)

Question 6

strengths of matched pairs design ?

Answer 6

• ps only take part in 1 condition so order effects and demand characteristics are less of a problem