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Independent groups study definition
Pps only do 1 condition of the IV
Repeated measures study definition
Participants do all levels of the IV
Matched pps study definition
Pps are matched based on pre-existing characteristics and each one of a pair does on level of the IV
Advantages of independent groups study
Lower demand characteristics
Decreases order effects
Advantage of repeated measures
No individual differences
Advantages of matched pps
Minimised individual differences
No order effects
Less demand characteristics
Disadvantages of independent groups
Individual differences
Disadvantages of repeated measures
Order effects
More demand characteristics chance
Disadvantages of matched pps
Well expensive in cash and time