Time Series Design

• Time Series Design:

  • aka quasi experimental design
  • following people for a period of time, so is a prospective design
  • consists of having a prolonged duration to measure a baseline, measuring people more than one time during that baseline
  • similar format to pre-test post-test design, but allows for a more reliable measure of the dependent variables baseline before we manipulate it
  • we follow them for some time after the manipulation

  
• Time Series Design:

  • can vary the timing of manipulation, so its different for different people within the test
  • this makes it less likely that a single confounding variable affects the dependent variables
  • it is best to do this randomly, so the researcher can't bias when the manipulation occurs
  • this is called an interrupted/randomised time series designs