Types of Experiment

• What is the main characteristic of laboratory experiments?

  They are conducted in a controlled environment.
• Why do laboratory experiments have high internal validity?

  Because variables are manipulated in a controlled environment.
• What are the advantages and disadvantages of laboratory experiments?

  Advantages:

  • Replicable
  • Establish cause/effect

  
  

  Disadvantages:

  • Low ecological validity
  • Demand characteristics
• What is a key feature of field experiments?

  They are conducted in a natural environment.
• How do field experiments differ from laboratory experiments regarding participant awareness?

  Participants are unaware of the study in field experiments.
• What are the advantages and disadvantages of field experiments?

  Advantages:

  • Higher ecological validity
  • Less demand characteristics

  
  

  Disadvantages:

  • Less control
  • Ethical issues (consent)
• What defines natural experiments?

  They involve pre-existing variables with no manipulation.
• What is a key advantage of natural experiments?

  They have high ecological validity.
• What are the advantages and disadvantages of natural experiments?

  Advantages:

  • High ecological validity
  • Ethical for studying real events

  
  

  Disadvantages:

  • No control over variables
  • Hard to replicate
• What characterizes quasi experiments?

  They involve pre-existing groups with no manipulation of the independent variable.
• Why are quasi experiments useful?

  They are useful when random assignment is impossible.
• What are the advantages and disadvantages of quasi experiments?

  Advantages:

  • High ecological validity in real-world contexts
  • Useful when random assignment is impossible

  
  

  Disadvantages:

  • No random assignment
  • Cannot establish strong cause/effect