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Reliability vs. validity

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Explain the types of and major differences between reliability and validity. In addition, please list two other criteria that are characteristic of effective tests.

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The answer to this problem explains the difference between validity and reliability. The references related to the answer are also included.

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The main differences between reliability and validity are that reliability refers to the degree to which the test produces stable and consistent results. The consistency is determined through repeated application. Reliability means that unsystematic errors of measurement are low. In simple terms, it means that repeated measures would give similar results. Reliability is the extent to which a variable is consistent with what they measure. There are several ways in which reliability is measured. These include test retest reliability, internal consistency reliability, inter-judge reliability, ...

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  • BSc , University of Calcutta
  • MBA, Eastern Institute for Integrated Learning in Management
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