Types pf statistical tests

Systematic and unsystematic

  • Systematic
    • Reproducible and consistent
    • Has an underlying cause (experimental variable)
  • Unsystematic
    • Random and unpredictable
    • Also known as error

IVs and DVs

  • IV: Independent Variable
    • Variable that you think causes the effect on another variable
    • Variable that is manipulated in an experiment
  • DV: Dependent Variable
    • The outcome variable
    • Variable measured in an experiment

Types of AB Testing

  • Between-Subjects
    • Participants assigned to 2 different conditions
    • Example: Participants experience either experimental condition or control
  • Within-Subjects
    • All participants in both conditions
    • Example: Participants get both experimental and control versions of task; Participants all tested before and after an experience (pre-post design)
Between-Subjects Within-Subjects
Larger sample size needed
May need to control for variation between individuals
Easier to design and statistically analyze