Experimental design
- Created by: jessicawarren
- Created on: 26-04-16 09:57
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- Experimental Design
- Repeated Measures
- Uses same participants in each condition
- Participant variables: intelligence, motivation, past experience etc kept constant between conditions
- Better statistical tests used because of less variation between conditions
- Fewer participants required, more economical
- Order effects e.g learning, fatigue, boredom. May become constant errors when one condition done after another
- Demand characteristics- guess aim of study, act differently
- Different tests may be needed
- Independent measures
- Uses different participants in each condition
- Order effects do not influence a second condition
- Demand characteristics less of a problem
- Same test can be used
- Subject variables differ, which could become confounding variables
- Worse statistical tests, more variation between conditions
- More participants required, less economical
- Matched pairs
- Uses different but similar participants in each condition e.g similar intelligence, age, ability
- Subject variables kept constant between conditions
- Better statistical tests used, less variation between conditions
- Order effects do not occur
- Less demand characteristics
- Same test can be used
- Participant variables can never be perfectly matched
- Matching participants is time consuming/difficult
- More participants required, less economical
- Repeated Measures
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