Types of experiment

• What are the different types of experiments mentioned?


  Laboratory, field, natural, or quasi experiments.
• What are the strengths and limitations of laboratory experiments?

  Strengths:

  • High control over extraneous variables
  • More certain cause and effect (high internal validity)
  • Easier replication

  
  

  Limitations:

  • Low generalisability (artificial environment)
  • Potential for unnatural behaviour (demand characteristics)
  • Low mundane realism
• What are the strengths and limitations of field experiments?


  Strengths:

  • Higher mundane realism
  • More valid and authentic behaviour
  • High external validity

  
  

  Limitations:

  • Loss of control over extraneous variables
  • Difficult to establish cause and effect
  • Ethical issues with participant consent
• What are the strengths and limitations of natural experiments?


  Strengths:

  • Opportunities for research not otherwise possible
  • High external validity

  
  

  Limitations:

  • Rarely occurring events limit research opportunities
  • Lack of random allocation may lead to confounding variables
• What are the strengths and limitations of quasi-experiments?


  Strengths:

  • Conducted under controlled conditions
  • Share strengths of lab experiments

  
  

  Limitations:

  • Cannot randomly allocate participants
  • Potential for confounding variables
• What is a true experiment?


  An experiment where the independent variable is directly manipulated by the researcher.
• Name and explain the types of experiment

  Lab experiment: IV is manipulated in a controlled setting

  field experiment: IV is manipulated in a natural setting

  natural experiment: IV has been manipulated naturally, effect on DV is recorded

  Quasi experiment: IV is based on an existing difference between people, effect on DV is recorded.