Experimental Design

Question 1

Repeated measures design

Answer 1

The same participants do all aspects of the study

Question 2

Advantages of RMD

Answer 2

-Requires less participants-> more economical (less time and money)
-Control of participant variables e.g. age, height
-Often lab experiment

Question 3

Disadvantages of RMD

Answer 3

-Order effects may influence performance
-Demand characteristics

Question 4

Independent groups design

Answer 4

Participant only does one condition or task. Where two groups are exposed to different experimental conditions

Question 5

Advantages of IGD

Answer 5

-Avoids order effects
-Less likely to be affected by demand characteristics

Question 6

Disadvantages of IGD

Answer 6

-Participant variables e.g. age can influence results
-Bigger sample needed -> costs time and money

Question 7

Matched pairs design

Answer 7

Two separate groups matched on important characteristics e.g. age, identical twins

Question 8

Advantages of MPD

Answer 8

-Avoids order effects
-Avoids participant variables

Question 9

Disadvantages of MPD

Answer 9

-Requires a big sample
-Not practical e.g. motivation