Types of Experiments

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  • Types of Experiments
    • Lab
      • Refers to a controlled environment, eliminating any other variables besides those they want to examine
        • Advantages
          • High validity control over EV means cause and effect can be established
          • High reliability - standardised procedures makes the experiments replicable
        • Limitations
          • Low ecological validity - artificial environment may result in HE therefore high DC
          • Risk of researcher bias
    • Field
      • Research conducted in the natural environment
        • Strengths
          • Higher ecological validity - represents real life better, means behaviour is more likely to be natural
          • Low chance of DC
        • Limitations
          • Low validity due lack of control over EV which will result in CV
          • Low reliability - lack of control over variables makes replicating the experiment difficult
          • Vulnerable to sample bias
          • Ethical issues of gaining informed consent + use of data
    • Natural
      • examine the effect that manipulated variables (IVs) have on measured variables (DVs), i.e. causal effects.
        • Advantages
          • High ecological validity - behaviour examined is reflective of real life
        • Limitations
          • Ethical issues of consent - debriefing is required
          • Low internal validity - unable to control variables
    • Quasi
      • contains a naturally occurring IV. the naturally occurring IV is a difference between people that already exists
  • Correlation and experiments
    • A correlation looks at the relationship between two variables
    • An experiment is too test the effect one variable (IV) has on another variable (DV)


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