J Patient Rep Outcomes 2021 Jul 30;5(1):64. Epub 2021 Jul 30.
Swinburne University of Technology, Centre for Global Health and Equity, School of Health Sciences, PO Box 218, Hawthorn, Melbourne, Victoria, 3122, Australia.
Background: Contrary to common usage in the health sciences, the term "valid" refers not to the properties of a measurement instrument but to the extent to which data-derived inferences are appropriate, meaningful, and useful for intended decision making. The aim of this study was to determine how validity testing theory (the Standards for Educational and Psychological Testing) and methodology (Kane's argument-based approach to validation) from education and psychology can be applied to validation practices for patient-reported outcomes that are measured by instruments that assess theoretical constructs in health.
Methods: The Health Literacy Questionnaire (HLQ) was used as an example of a theory-based self-report assessment for the purposes of this study. Read More