Research methods experimental design and types - with explanation and advantages and disadvantages.
Types of experiment and experimental design. With descriptions and strenghts and weaknesses.
- Created by: Emma-watson97
- Created on: 24-04-14 18:10
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- Experiment Design and type
- Independent Groups Design
- Participants are randomly allocated to either one condition of the other of the conditions.
- + No order effects, reduced chance of demand characteristic.
- - Least effective for controlling participant variables and more participants are required.
- Matched Pairs Design
- Participants are as closely as possible matched with another participant with another participant and then the pairs are randomly allocated conditions
- + No order effect, and a good attempt at controlling participant variables
- - Difficult to match participants and more participants are required
- Laboratory Experiment
- Lab experiments are where the Independent variables are manipulated and the extraneous variables are controlled.
- + high levels of control and a high replicability
- - lacks ecological validity and can be criticized for artificiality.
- Field Experiment
- Controls the independent variable but does not control the extraneous variables
- + cause and effect can be concluded and there are high levels of ecological validity.
- - less control of extraneous variables and time consuming
- Natural Experiment
- Participants are observed in their natural environment, doesn't manipulate the Iv and ther is no random allocation (quasi-experiment)
- + high ecological validity and is useful where it is considered unetical for the IV to be manipulated
- - high internal validity and no random conditions.
- Repeated Measures Design
- The same participants are used in both conditions. It is best used when there's only a small number of participants.
- + Participant variables are eliminated and uses fewer participants.
- - Order effect can occur (fatigue, learning and boredom) and there is an increased chance of demand characteristic occurring.
- Independent Groups Design
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