Reliability

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  • Reliability
    • Inter-rater reliablility
      • 2 observers watch the same thing
      • reliable if 80% the same
      • How to improve
        • Train observers
          • Shows observers what behaviour is classed as - what they are looking for
        • Operationalise
          • Define exactly what you mean by each behaviour
        • Good view of the behaviours
          • The observers must both be able to see the same things
    • Test re-test reliability
      • One researcher does a test and re-does the same test later with the same sample
      • reliable if 80% the same
      • How to improve
        • Change the test
          • Change the parts of the test that had low correlation
    • Test using correlation

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