Psychology- Types of experiment
- Created by: Daisymac
- Created on: 16-01-19 17:20
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- Types of experiment
- Lab experiments
- Conducted in a highly controlled environment in which the researcher manipulates the IV and records the effect on the DV
- Strengths- P High control over extraneous variables E means the researcher can ensure any effect on DV is because of the IV . E high internal validity
- P may lack generalisability E lab environment may be quite artificial and not like every day life . E low external validity
- Field experiments
- An experiment where by the change in the IV is not brought about by the researcher but would have happened even if the researcher had not been there
- Strengths- P have high mundane realism . E because environment is more natural and so produce natural behaviour . E high external validity
- Weaknesses- P Loss of control of extraneous variables. E the cause and effect between iv and dv are more difficult to establish . E lack external validity
- Natural experiments
- An experiment where the change in the iv is not brought about by the researcher but would have happened even if the researcher was not here
- Strengths- P provide opportunities for research that may not otherwise have been ethical . E High external validity
- Limitations- P naturally occurring event may only happen rarely . E may limit the scope for generalising to other situations
- Quasi experiments
- A study that is almost an experiment but lacks key ingredients. The iv has not been determined by anyone and variables simply exist
- Strengths-same as lab experiments
- Weaknesses- Cannot randomly allocate participants to conditions and therefore there may be confounding variables
- Lab experiments
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