Repeated Measures Design

• Repeated Measures Design:

  • the same group of people have the dependent variable measured at baseline, are given the first condition which is either the manipulation or a placebo, this is then measured, then the same group of people go through the second condition which is once again the manipulation or placebo and this is measured again
  • but this results in order and carry over effects

  
• Order and carry over effects:

  • Time remains a confounder, natural recovery can occur
  • Treatments might have lasting effects (positive or negative)
  • So each treatment might start from a different baseline
  • but randomisation of the order of different people experiencing the different conditions can control this