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  • Validity
    • Whether a test does what it set out to do
    • Internal validity
      • Has the researcher measured what they intended to measure
    • External validity
      • Results can be generalised
    • Assessing validity
      • Face validity
        • You or someone else looks at the test to see if it looks like it measures what it set out to
      • Concurrent validity
        • Compare your test to an established test that has validity
    • Improving validity
      • Questionnaire
        • Anonymous - reduces social desirability bias
      • Experiment
        • Control group
        • Standardised - reduce investigator and participant effects
      • Observation
        • Ensure categories are not overlapping or too broad


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