Practical and Methodological Considerations Regarding Reliability

  • Michael D. Franzen
Part of the Critical Issues in Neuropsychology book series (CINP)


Reliability refers to the level of consistency or stability in the values of the scores that an instrument elicits. Reliability has different manifestations and methods of evaluation. It is possible to speak of split-half reliability, test—retest reliability, or alternate-forms reliability. Although these types of reliability require different methods of measurement, they are all ways of indexing the amount of variance in a test that is the result of error in measurement. Thus, reliability measurement is an attempt to estimate the percentage of error variance (Anastasi, 1982).


Item Response Theory Internal Consistency Reliability Latent Trait True Score Memory Item 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Michael D. Franzen
    • 1
  1. 1.Allegheny General Hospital and Medical College of Pennsylvania/Hahnemann UniversityPittsburghUSA

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