Experimental design
- Created by: z_mills1
- Created on: 12-05-14 19:28
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- Experimental design
- Repeated measures
- same participants are used in both conditions
- Advantages
- individual differences should no longer affect the results as same people in both conditions
- fewer participants are needed to get the same amount of data
- Disadvantages
- order effects may occur with participants doing both conditions
- range of use is smaller
- Independent groups
- participants are randomly allocated to different groups which represent the different conditions
- Advantages
- no order effects - no one gets better through practice or gets worse through fatigue
- demand characteristics less likely to occur - pp's will be unaware of other condition
- Disadvantages
- individual differences between people in each group may affect the results
- twice as many participants are needed to get the same amount of data, compared to everyone doing both conditions
- Matched pairs
- pairs of participants are closely matched then randomly allocated to one condition
- Advantages
- no order effects - different people in each condition
- individual differences are minimised through close matching
- Disadvantages
- need twice as many people compared to repeated measures
- time-consuming and difficult to find participants that match
- Repeated measures
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