Types of experiments

• What are the different types of experiments discussed in the video?

  Lab, Field, Natural, and Quasi experiments
• What is the main principle of a laboratory experiment?

  The experimenter has full control over what happens in the experiment
• What are variables in a lab experiment?

  Factors that are controlled and do not vary between conditions
• What is the independent variable in an experiment?

  The factor that changes between the conditions
• What is the dependent variable in an experiment?

  The variable that is measured to see how it is affected by the independent variable
• How can a lab experiment demonstrate a cause and effect relationship?

  By controlling all other variables, allowing the independent variable to be the only factor that changes
• What does high internal validity in a lab experiment indicate?

  That the observed effect is real and due to the change in the independent variable
• What is a disadvantage of lab experiments regarding external validity?

  Lab experiments may not generalize to real-world environments
• What is meant by mundane realism in lab experiments?

  The tasks used in the experiment are often unusual and not reflective of real-world tasks
• What are demand characteristics in a lab experiment?

  When participants change their behavior because they know they are being studied
• How do field experiments address the weaknesses of lab experiments?

  They are conducted in real-world settings where people behave naturally
• What is a strength of field experiments?

  Increased external validity due to naturalistic behavior
• What is a weakness of field experiments?

  Lack of control over extraneous variables
• What distinguishes a natural experiment from other types?

  The independent variable has already occurred naturally
• What is a strength of natural experiments?

  They allow research in areas that could not be ethically studied otherwise
• What is a limitation of natural experiments?

  Researchers have no control over extraneous variables
• What is a quasi-experiment?

  An experiment where participants cannot be randomly assigned to conditions
• What is a strength of quasi-experiments?

  They are the only way to study certain factors like age or gender
• What is a limitation of quasi-experiments?

  Differences in groups may exist beyond group membership
• What are the strengths and weaknesses of laboratory experiments?

  Strengths:

  • High internal validity
  • High replicability

  
  

  Weaknesses:

  • Low external validity
  • Lack of mundane realism
  • Demand characteristics
• What are the strengths and weaknesses of field experiments?

  Strengths:

  • Increased external validity
  • Higher mundane realism

  
  

  Weaknesses:

  • Lack of control over extraneous variables
  • Reduced internal validity
• What are the strengths and weaknesses of natural experiments?

  Strengths:

  • Ethical research in sensitive areas
  • High external validity

  
  

  Weaknesses:

  • No control over extraneous variables
  • Difficult to replicate
• What are the strengths and weaknesses of quasi-experiments?

  Strengths:

  • Only way to study certain factors

  
  

  Weaknesses:

  • Potential confounding variables
• How many tutorial videos are mentioned for AS and A-level research methods?

  Six tutorial videos
• What resources are available on psych boost for patrons?

  Access to exam tutorial videos and printable resources
• Who is thanked for supporting psych boost?

  Students and teachers