Controlling extraneous variables

    Cards (9)

    • Give three ways a researcher can control for extraneous variables.
      • (C)ounterbalancing
      • Random allocation
      • (S)ingle blind
      • (D)ouble blind
      • (R)andomisation
      • (St)andardisation
    • What is a demand characteristic?
      Any cue from the researcher or the situation that may be interpreted by participants as revealing the purpose of the investigation.
    • What is an investigator effect?
      Any effect of the investigators behaviour (conscious or unconscious) on the dependent variable.
    • What can investigator effects include in terms of the investigators behaviour?
      The selection of or interaction with participants during the research process.
    • What can investigator effects lead to?
      Participants changing their behaviour within the research situation.
    • What can be introduced to overcome investigator effects and demand characteristics?
      Double blind trails
    • What can be done to eliminate demand characteristics?
      Single blind or double blind trails
    • What can be done to eliminate investigator effects?
      Double blind trail
    • What would happen in a drug trail which uses double blind trails.
      Both the participant and the researcher don't know who has the placebo or the real drug.