title: Power transformation for enhancing responsiveness of quality of life questionnaire.
abstract: We investigate the effect of power transformation of raw scores on the responsiveness of quality of life survey. The procedure maximizes the paired t-test value on the power transformed data to obtain an optimal power range. The parallel between the Box-Cox transformation is also investigated for the quality of life data.
authors.affiliation: Yale School of Management, New Haven, CT 06510 USA ; California State University, East Bay, Hayward, CA 94542 USA.
authors.forename: YanYan Ange
authors.initials: YA
authors.lastname: Zhou
keywords: Asthma quality of lfe questionnaire (AQLQ); Box–Cox transformation; Paired t-test; Responsiveness