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Encyclopedia of Quality of Life and Well-Being Research pp 3481–3482Cite as

Known-Groups Validity

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Synonyms

Extreme-groups validity

Definition

Known-groups validity is demonstrated when a test or questionnaire can discriminate between two groups known to differ on the variable of interest.

Description

Pain, mood, attitudes, disability, and quality of life are examples of health constructs that are not directly observable and have no “gold standard” method of measurement. One way to test the construct validity of a test or questionnaire when there is no gold standard is to examine known-groups validity (or extreme-groups validity). In this approach the test or questionnaire is administered to two groups that are known to have or that logically should have different levels of the construct to confirm whether the hypothesized difference is reflected in the scores of the two groups.

Examples of known-groups validity testing are as follows:

  • Davenport and de Morton (2011) reported that de Morton Mobility Index(DEMMI) scores were significantly better for people who ambulated without an...

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References

  • Davenport, S. J., & de Morton, N. A. (2011). Clinimetric properties of the de Morton mobility index in healthy, community-dwelling older adults. Archives of Physical Medicine and Rehabilitation, 92, 51–58.

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  • Devoogdt, N., Van Kampen, M., Geraerts, I., Coremans, T., & Christiaens, M. R. (2011). Lymphoedema functioning, disability and health questionnaire (lymph-ICF): Reliability and validity. Physical Therapy, 91, 944–957.

    Article  Google Scholar 

  • Iverach, L., Menzies, R., Jones, M., O’Brian, S., Packman, A., & Onslow, M. (2011). Further development and validation of the unhelpful thoughts and beliefs about stuttering (UTBAS) scales: Relationship to anxiety and social phobia among adults who stutter. International Journal of Language & Communication Disorders, 46, 286–299.

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Author information

Authors and Affiliations

  1. School of Physiotherapy, La Trobe University, 3086, Bundoora, VIC, Australia

    Megan Davidson

Authors
  1. Megan Davidson
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Corresponding author

Correspondence to Megan Davidson .

Editor information

Editors and Affiliations

  1. University of Northern British Columbia, Prince George, BC, Canada

    Alex C. Michalos

  2. (residence), Brandon, MB, Canada

    Alex C. Michalos

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© 2014 Springer Science+Business Media Dordrecht

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Davidson, M. (2014). Known-Groups Validity. In: Michalos, A.C. (eds) Encyclopedia of Quality of Life and Well-Being Research. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0753-5_1581

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  • DOI: https://doi.org/10.1007/978-94-007-0753-5_1581

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-007-0752-8

  • Online ISBN: 978-94-007-0753-5

  • eBook Packages: Humanities, Social Sciences and Law

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