Groups Design

Question 1

Repeated measures

Answer 1

Same conditions for all participants 
Control of participant variables 
More economical
Order/practice effects
Demand characteristics

Question 2

Matched pairs design

Answer 2

Different, but similar, participants used in each condition
Attempts to tackle individual differences
No order or practice effects
Difficult and time consuming
Can’t remove all differences

Question 3

Independent groups design

Answer 3

Different participants used in each condition 
No risk of practice effects 
Less demand characteristics 
No control of individual differences 
Twice as many participants needed