Development and initial psychometric validation of the advisor experience survey.

220Background: Patient, family and public engagement builds strong, sustainable partnerships benefitting the planning, delivery and evaluation of health services. With growing international evidence and increased organizational investment supporting this type of engagement, evaluating the experience of these individuals is essential to ensuring meaningful participation and value. This study describes the development and psychometric properties of the Advisor Experience Survey in order to assess on-going patient, family and public advisor engagement at the system-level. Methods: The development and psychometric validation consisted of five steps: 1) literature review to identify relevant engagement experience items; 2) modified Delphi process where relevant engagement experience items were rated by experts; 3) cognitive interviews to ensure that items were clear and understandable; 4) pilot of survey; and 5) exploratory and confirmatory factor analysis (EFA; CFA) to determine construct validity. Results: T...