• Experiments are investigations in which the researcher directly manipulates at least one variable.
  
  
• In experiments, you manipulate the IV and measure its impact on the DV.
  
  
• When designing your study, cover as much of the range in your IV as possible.
  
  
• Sometimes we are interested in subject variables - variables that cannot be manipulated by the investigator. We have less confidence in our conclusions when we cannot manipulate the IV.
  
  
• Confounds are other variables associated with the IV that can also explain your DV. Eliminate confounds when possible.

Test your knowledge of this workshop by taking the Workshop Quiz.