Psychology AQA reliability

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  • Reliability
    • Extent to which the mesurment of a particular behaviour is  consistent
      • If the research can be easily repeated and produce similar results
    • External reliability
      • TEST RETEST- Giving the same test to the same participant  on a different occasion, after they 'forget' the Qs.Reliable IF results correlate
      • Measures consistency from one occasion to another. (eg.different day/lab/time)
    • Internal Reliability
      • SPLIT-HALF method - randomly choosing half of the answers from a test and comparing it with the other half. Reliable IF there is a + correlation.
      • extemt to which a test is consistent withing itself (eg/ questionnaiters should be measuring the sme thing.)
    • Improving researcher reliability
      • INTRA RATER- consistency of a researcher's behaviour. SHould produce similar results
      • INTER RATER- consistency between DIFFERENT researchers on the same study.
        • Improved by: training observers & ensuring behaviour categories are operaionalised
  • Extent to which the mesurment of a particular behaviour is  consistent
    • If the research can be easily repeated and produce similar results

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