DOWNLOADABLE FORMS TOP DOWNLOADED Expand Working Group Membership & Collaborator Details Core Domain Set Development Checklist Domain Definition Report OMERACT Onion Template Summary of Measurement Properties (SOMP) Table CORE DOMAIN SET DEVELOPMENT Expand Core Domain Set Development Checklist Working Group Membership & Collaborator Details PICOC Domain Development Tracker Domain Definition Report OMERACT Onion Template INSTRUMENT SELECTION PART A Expand OMERACT Instrument Selection Checklist: Part A Summary of Measurement Properties (SOMP) Table INSTRUMENT SELECTION PART B Expand OMERACT Instrument Selection Checklist: Part B Good Methods Checklist Summary of Measurement Properties (SOMP) Table INSTRUMENT SELECTION REPORTING TABLES Expand Description of the studies in general Construct Validity Known Groups Test-Retest Reliability Clinical trial discrimination Inter-Method Reliability Thresholds of Meaning Construct Validity Correlational Responsiveness OTHER Expand