Experiments and Variables

• Variables

  • Independent variable:
  • Manipulated
  • Effect on DV observed
  • Dependent variable:
  • Variable researcher measures
  • To investigate IV impact
  • Precisely operationalise IV and DV
  • More replicable, reliable and objective
  • Also easier for psychologists to determine validity
  • Extraneous variable:
  • Could affect DV if uncontrolled
  • Confounding variable:
  • Uncontrolled extraneous variable
  • Affect study results
  • Situational Variables:
  • Extraneous variable related to situation
  • Participant Variables:
  • Extraneous variables related to participants