• Group Comparisons Research Designs
    • Experimental Research Design
      • X=Treatment
      • O=Observation (Test)
      • R=Random Assignment
    • Quasi-Experimental Design
    • Causal-Comparative Design (Ex Post Facto)
  • Treats to Experimental Validity
    • Internal (see handout)
    • External
      • Ecological
      • Population
  • Subject Characteristics
    • Constants
    • Variables
      • Independent
      • Dependent
      • Moderator
      • Extraneous
  • Measurement Scales
    • Nominal
    • Ordinal
    • Interval
    • Ratio
  • Review for Test