I.Policyi.Regulatorsiii.Patient Engagementiv.Legalv.SustainabilityII.Practicei.Bridging legacy instrumentsii.QPROMSiii.PROMiv.Visual Functioning daily activities item bankv.Neuromuscular disease clinical trialsIII.Methods/Methodologyi.Qualitative - patientsii.Qualitative - cliniciansiii.Psychometric analysis - Rasch Modeliv.Mixed methodsv.Construct Specification EquationsIV.Theory/History/Philosophyi.A history of social measurementii.A history of clinical outcomesiii.Validityiv.Rasch Measurement Theoryv.Linking social measurement to person centered outcome metrology