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Floor and Ceiling Effect/Evidence
Method evidence record

Floor and Ceiling Effect

Floor and ceiling effects are psychometric phenomena in which a disproportionately large proportion of respondents achieve the lowest (floor) or highest (ceiling) possible score on a measurement scale. These effects compromise scale reliability and responsiveness, limiting the instrument's ability to distinguish among respondents and detect meaningful change over time. Systematic assessment of floor and ceiling effects is essential for evaluating the psychometric adequacy of health-related quality-of-life scales, functional status measures, and other patient-reported outcomes.

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Assessment of Floor and Ceiling Effects in Psychometric Scale Validity and Responsiveness
Taxonomic method record · process-pipeline / psychometrics
  • McHorney, C. A. (2000). Ten recommendations for measuring health status. Health-Related Quality of Life Outcomes, 2(1), 1-5. · URL
  • Terwee, C. B., Bot, S. D., de Bats, M. R., van der Windt, D. A., Knol, D. L., Dekker, J., Bouter, L. M., & de Vet, H. C. (2007). Quality criteria for measurement properties of health status questionnaires. Journal of Clinical Epidemiology, 60(1), 34-42. · DOI 10.1016/j.jclinepi.2006.03.012
  • Coon, C. D., & Cappelleri, J. C. (2016). Quantifying ceiling and floor effects in the Quality of Life after Brain Injury (QOLIBRI) scale. Health and Quality of Life Outcomes, 14(1), 135. · URL
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Related methods

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Same method familyAnchor-Based Minimal Important Differencemachine-suggested · Relational suggestion, not evidence.Taxonomic bucketContent Validity Ratiomachine-suggested · Relational suggestion, not evidence.Taxonomic bucketFactor Analysis for Scale Developmentmachine-suggested · Relational suggestion, not evidence.Taxonomic bucketLikert Scale Constructionmachine-suggested · Relational suggestion, not evidence.

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Sources

3 recorded citations, copied from the method source record.

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