(RM) Types of Experimental Designs

Question 1

What is Repeated Measures?

Answer 1

Participants experience all conditions

Question 2

What are the + and - of repeated measures?

Answer 2

+ No participant variables
+ Requires few participants
- Practice effects - have already done 1 condition, thus 2nd will be easier
(this can be eliminated using counterbalancing - ABBA)
- Demand characteristics

Question 3

What is Independent Groups?

Answer 3

Participants only experience 1 condition

Question 4

What are the + and - of Independent Groups?

Answer 4

+ No participants with order effects
+ Cheap
+ Quick to recruit participants
- More participants needed than with repeated measures
- May be important participant variables between people that are not controlled for

Question 5

What is Matched Pairs?

Answer 5

Participant is matched with someone with similar traits - Experience 1 condition each

Question 6

What are the + and - of Matched Pairs?

Answer 6

\+ Controls for individual differences
\+ No difference between the people in the different conditions
- Difficult to match people
- Time-consuming
- Can be costly