Experimental designs

• 3 types of experimental design:

  
  

  • Independent measures
  • Repeated measures
  • Matched pairs
• Independent measures design:

  • 2 separate groups doing one level of IV each
  • Avoids order effects
  • Potential ppt variables
• Repeated measures design:

  • All ppts do all levels of the IV
  • Order effects (solved by counterbalancing)
  • Avoids ppt variables
• Matched pairs design:

  • Ppts matched based on characteristics that could affect the DV + all do every level of IV
  • Potential order effects
  • Avoids ppt variables