Experimental Design(RM)

Question 1

What is an indépendant group design?

Answer 1

An experimental design in which each participants takes part in only one of the conditions of the experiment

Question 2

What are the strengths of independent group design?

Answer 2

There are no order effects
As both conditions can be tested simultaneously there is a saving of time and effort
As participants are involved in one condition only, potential investigator effects and demands characteristics are reduced

Question 3

What are the limitations of independent group design?

Answer 3

Participant variables may affect the results
By chance participants in one group may differ in some crucial way to participants in the other
Participants only doing one condition so twice as many participants needed compared to repeated

Question 4

What is repeated measures design?

Answer 4

An experimental design where each participant takes part in all conditions of the experiment

Counterbalancing
Randomisation

Question 5

What are the strengths of repeated measure design?

Answer 5

Used fewer participants (get two or more scores per participants saving time, effort and money)
Participant variables are not a concern

Question 6

What are the limitations of repeated mesures design?

Answer 6

There is a risk of order effects and the need to limit these can make the design complex

The cost of a loss of participants is greater since data for both conditions is lost compared to one in indépendant group design

Question 7

What is matched pair design?

Answer 7

An experimental design where participants in each condition of the experiment are matched according to important variables

Question 8

What are the strengths of matched pairs design?

Answer 8

Good control of participant variables

Eliminate order effects

Question 9

What are the limitations of matched pair design?

Answer 9

Matching participants is very difficult