What is the difference between a field experiment and a natural experiment?
Field - changes are the result of the researcher. Natural - changes are naturally occurring and would occur without the researcher.
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What are the four main types of experiments?
Field, Laboratory, Natural and Quasi.
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What do all experiments include?
A change in the IV where the researcher measures the impact this has on the DV.
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What are the features of a laboratory experiment?
Usually in a controlled environment, IV directly manipulated by the researcher, effect of IV on the DV directly measured, extraneous variables measured as much as possible.
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What are the benefits of a laboratory experiment?
Can establish cause and effect, well controlled so easy to replicate demonstrating high external validity, high control over extraneous variables so high internal validity.
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What are the weaknesses of a laboratory experiment?
Environment contrived which means low ecological validity and mundane realism, demand characteristics likely present, not possible in situations where you cannot manipulate the IV.
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What are the features of a field experiment?
Research where the IV is directly manipulated and measures the impact on the DV. Carried out in a real-life setting such as a school, town-centre or hospital.
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