How to Develop and Validate a GI Questionnaire

Enrique Rey, G. Richard Locke

Research output: Chapter in Book/Report/Conference proceedingChapter


Advances in medicine rely on scientific methods, and objective measurements are critical for applying these. However, medicine is essentially subjective in many senses, especially in information recalled by patients, and other such outcomes. Questionnaires are intended to measure, as objectively as possible, these subjective elements. As measurement instruments, they should be developed and the quality of the measurement tested. The process of developing a questionnaire is more than just writing questions; the objective of the questionnaire should direct the process and issues such as how it will be used should be considered. Just developing the questionnaire is not enough; it must be validated to become an instrument that can be trusted. Validation is a systematic process for testing the feasibility, reliability, and validity of a questionnaire. Reliability is like precision (the answers remain the same when the process is repeated) and validity is like accuracy (the answers represent the truth).

Original languageEnglish (US)
Title of host publicationGI Epidemiology
Subtitle of host publicationDiseases and Clinical Methodology: Second Edition
Number of pages10
ISBN (Electronic)9781118727072
ISBN (Print)9780470672570
StatePublished - Jan 13 2014


  • Construct validity
  • Content validity
  • Criterion validity
  • Discriminant validity
  • Epidemiology
  • Face validity
  • Patient-reported-outcomes
  • Questionnaires
  • Reliability
  • Validity

ASJC Scopus subject areas

  • Medicine(all)


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