Psychometric evaluation of patient-reported experience measures: is it valid?

Multiple published studies and reviews have advocated the application of psychometric methods to the validation of patient experience measurement. Some such methods depend on measurement assumptions that may not be appropriate for patient experience. Rather than being the default approach for the validation of patient experience measurement, we argue that psychometric methods should be reviewed critically to determine their fit to the measurement application, and alternative approaches explored, so that the most appropriate validation methods can be identified.