Reliability

• Define reliability

  How consistent a measuring device/tool is
• What are the 5 types of reliability

  External, internal, test-retest, inter-rater and split half
• Define external reliability

  Whether a measuring tool will always produce the same result.
• Define internal reliability

  Whether a measure is consistent within itself.
• Define test-retest method

  Testing the same participant twice on the same test.
• Define inter-rater reliability (also known as inter-observer)

  Two researchers scoring results and checking for agreement.
• Define split-half method

  Getting the participant to do the test in two halves.