Learning Objectives

  • Describe a statistical advantage to using within subjects design. Explain what practice, sensitization, and carryover mean in the context of within subjects design. Explain why research on learning is well suited for within subjects design.
     
  • What is the purpose of counterbalancing a design? What are the differences between complete counterbalancing, partial counterbalancing, and Latin Square design? When would you use each of them?
     
  • List two ways you can add complexity to a within subjects design. What is a mixed design?
     
  • Why would Campbell and Stanley (1963) label the single-group pre–post design a “pre-experimental” design? What are the advantages and disadvantages of the Solomon four-group design?
     
  • What kinds of research questions seem well suited for interrupted times-series design? Why does this approach involve so many points of measurement? Where would you look to find data for this approach?
     
  • What is a postoccupancy evaluation (POE)? What is a nonequivalent control group, and why are these hard to find in the real world?
     
  • What is the chief benefit of longitudinal designs, in your view? What issues prevent researchers from undertaking longitudinal research? As a researcher, what can you do to reduce the likelihood that participants will drop out of a longitudinal study? What specific steps can you take to make participants welcome?
     
  • What is a cohort? Explain how a cohort sequential approach combines aspects of both cross-sectional and longitudinal designs.