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Encyclopedia of Clinical Neuropsychology pp 3435–3436Cite as

Test Reliability

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Synonyms

Inter-rater reliability; Parallel forms reliability; Temporal reliability; Test-retest reliability

Definition

Test reliability refers to the extent to which a test measures without error. It is highly related to test validity. Test reliability can be thought of as precision, the extent to which measurement occurs without error. Test validity can be thought of as accuracy, the extent to which the test measures the hypothesized underlying construct. Reliability is not a constant property of a test and is better thought of as different types of reliability for different populations at different levels of the construct being measured. For example, the consistency in score for a measure of intelligence when observations are obtained at two different times in a sample of individuals performing in the superior range is one estimate of reliability.

Current Knowledge

The types of reliability correspond to the methods of estimating the influence of different sources of error. When the...

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References and Readings

  • American Educational Research Association and the American Psychological Association. (1999). Standards for educational and psychological tests. Washington, DC: American Psychological Association.

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  • Franzen, M. D. (2000). Reliability and validity in neuropsychological assessment (2nd ed.). New York: Plenum.

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Author information

Authors and Affiliations

  1. Allegheny General Hospital, Pittsburgh, PA, USA

    Michael Franzen

Authors
  1. Michael Franzen
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Corresponding author

Correspondence to Michael Franzen .

Editor information

Editors and Affiliations

  1. Department of Physical Medicine and Rehabilitation, Virginia Commonwealth University, Richmond, VA, USA

    Jeffrey S. Kreutzer

  2. Kessler Foundation, Pleasant Valley Way, West Orange, NJ, USA

    John DeLuca

  3. Independent Practice, Wynnewood, PA, USA

    Bruce Caplan

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Cite this entry

Franzen, M. (2018). Test Reliability. In: Kreutzer, J.S., DeLuca, J., Caplan, B. (eds) Encyclopedia of Clinical Neuropsychology. Springer, Cham. https://doi.org/10.1007/978-3-319-57111-9_2241

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