Experimemtal Design Flashcards
3 types of experimental design
Independent measures
Repeated measures
Matched participants
How to do independent measures
1) recruit group of participant
2) divide them into types
3)one group does the task with condition 1 and another does task with condition 2
4) measure dv for each group
5) compare results
Advantage of independent measures
No order effects
Disadvantage of independent measures
No control over extraneous variables
Twice as many participants
How to deal with issues in independent measures
Randomly allocate participants to conditions
Match participants
How to do repeated measures
Recruit group of participant
1 Group does condition 1
Then the group does condition 2
Then compare results for conditions
Advantage to repeated measures
Individual differences are removed
Fewer participants needed
Disadvantage to repeated measures
Order effects
How to remove issues with repeated measures
Single blind design
Counterbalancing
Randomisation
How to do matched participants
Recruit participants
Find out what type of participants you have through quiz of some sort
Recruit another group that matches the people
Compare results from each pair
Advantage for matched pairs
No order effects
Controls some participant variables
Disadvantage to matched pairs
Difficult and time consuming
How to deal with matched pairs issues
Pilot study to show key variables that need to be matched
