L2 Lab experiments

• What is one major strength of a lab-based experiment?


  Control over variables
• Why is it important to control extraneous variables in a lab experiment?


  To ensure that only the independent variable affects the dependent variable
• What does it mean to establish cause and effect in an experiment?


  It means that the independent variable is the only factor affecting the dependent variable
• What does replicable mean in the context of lab experiments?


  It means the experiment can be repeated exactly with other participants
• What can we conclude if we get similar results from repeated lab experiments?


  Our results are reliable and confirm validity
• What is a major weakness of lab-based experiments?


  They are artificial and lack ecological validity
• What are the strengths and weaknesses of lab-based experiments?


  Strengths:

  • Highly controlled, allowing for cause and effect assumptions
  • Replicable, ensuring reliability

  
  

  Weaknesses:

  • Artificial, lacking ecological validity
  • May cause demand characteristics
• What are demand characteristics in lab experiments?


  When participants guess the experiment's purpose and change their behavior
• Can extraneous variables be controlled in a lab experiment?


  Yes
• Can cause and effect be established in a lab experiment?


  Yes
• Is a lab experiment similar to everyday life?


  No, it is not
• Who manipulates the independent variable (IV) in a lab experiment?


  The experimenter