Psychology- Reseach Methods A2

Research Methods including key words, advantages and disadvantages

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Lab Experiment

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A experiment conducted in a controlled environment which tends to be high in terms of internal validity as extraneous variables are controlled.


  • Easily replicated
  • Has high internal validity
  • Often less time consuming than other methods (interviews)


  • Artificial and lacks realism
  • Participants are aware of the experiments therefore may show demand characteristics
  • Experimenter may change the behaviour of the participants- experimenter bias
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Field Experiment

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An experiment conducted in a more natural envrionment studying behaviours.


  • Can still manipulate a variable to see cause and effect
  • Higher ecological validity
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