Experimental design Flashcards
1
Q
Independent groups
A
- two different groups have 2 different conditions
- if there are 2 levels of the IV, each group only experiences one of them
- there will be an experimental and control condition and them the means of the are compared (although not directly)
2
Q
repeated measures
A
- all participants experience both conditions
each participant would try both the experimental and control conditions - the means are then more directly compared
3
Q
matched pairs
A
- participants paired together based on similar characteristics/ variables
- control confounding variables of participant variables
(done because in repeated measures people become wise to the aims)
4
Q
Independent groups evaluation
A
- more likely you’re testing individual difference rather than the dependant and independent variable
+ this is dealt with by using random allocation
+ order effects aren’t a problem and they aren’t likely to get the aim
5
Q
repeated measures evaluation
A
- everyone has to do at least 2 task and the order may be significant (e.g if they’re drinking energy drinks they have to do this second)
+ this is helped by counterbalancing - order effects also arise because of boredom and fatigue
(order acts as a confounding variable) - demand characteristics more likely
+ participant variables are controlled so fewer participants needed
6
Q
matched pairs evaluation
A
+ demand characteristics less likely because there’s only one condition
- although there attempt of participant variable reduction, people can never be matched perfectly
- matching sometimes time-consuming and expensive, especially if pre-test is required
