... assessing the impact of RA on productivity within and outside the home and daily activities during the preceding month. It is self- reported by the patient, is interviewer-administered, and has ... productivity within and outside the home, and daily activities. The objective of this paper was toevaluate the discriminant validity, responsiveness, and reliability of the WPS-RA in patients ... version of the WPS-RA and to assess the utility of the instrument outside clinical trials and consequently assess cri-terion validity. Given the nature of the questions and the rela-tively good...