![]() For example, the items on a questionnaire or questions in an interview should be testing the same thing. Internal reliability refers to the consistency of a measure within itself. ![]() (1) Internal Reliability (the consistency of the measure within itself) Reliability is used to assess both experimental procedures and ‘tools’ such as tests, questionnaires, interviews and behavioural categories in observations. A reliable piece of research should always produce the same or similar results when replicated in exactly the same conditions with the same participants. If you are a reliable student you regularly turn up to your lessons and always hand in work on time. This aspect of research is known as reliability. Psychologists need to measure variables consistently. consistently produce inaccurate results). This replication involves repeating a research study under exactly the SAME CONDITIONS, using exactly the SAME PARTICIPANTS.īe aware: The results of an investigation may be reliable, but that does not mean that they are valid. Reliability means consistency. The results of a research study are reliable if, when the study is replicated, the same results are consistently found.
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