experimental design

Question 1

What is repeated measures

Answer 1

Same participants complete two or more levels of the independent variable

Question 2

Evaluate the use of repeated measures

Answer 2

+ Requires less participants
+ Reduces individual differences or participant variables
- Order effects may affect findings, For example participants may be bored fatigued or guess the aim of the study by the time they complete the second independent variable
+ However Order effects can be minimised by using counterbalancing

Question 3

What is independent groups design

Answer 3

Different participants complete two or more levels of the independent variable

Question 4

Evaluate an independent groups design

Answer 4

+ No order affects
+Time efficient
+ Participants less likely to show demand characteristics
- More participants are needed
- Individual differences or participant variables

Question 5

What is matched pairs design

Answer 5

Different participants complete different conditions but the participants are assessed and matched with a pair in the other condition based on characteristics

Question 6

Evaluate the use of a matched pairs design

Answer 6

+ Reduces individual differences whilst also reducing demand characteristics and order affects
- Matching is difficult and time-consuming