Experimental design Flashcards
Independent, repeated, matched pairs
Name the three types of experimental design
Independent measures, repeated measures, matched pairs
Describe independent measures design
Participants take part in one condition only (2 or more groups)
Strengths of independent measures design
No order effects, demand characteristics less of a problem
Weaknesses of independent measures design
Individual differences (participant variables)
Way to control weaknesses in an independent measures design
Random allocation - differences between them spread across different conditions
Describe repeated measures design
Participants take part in all conditions (1 group)
Strengths of repeated measures design
Eliminates participant variables (individual differences)
Weaknesses of repeated measures design
Order effects, greater chance of demand characteristics
Name the three order effects
Fatigue, boredom, practice
Way to control weaknesses in a repeated measures design
Counterbalancing - half group does one condition then two, other half two then one, ABBA
Describe matched pairs design
Participants matched on characteristics, in a pair - one completes first condition, other second, each participant takes part in one condition
Strengths of matched pairs design
No order effects, controls participant variables
Weaknesses of matched pairs design
Time consuming and hard to get right
Way to control weaknesses of a matched pairs design
For best match - identical twins
