RT Journal Article SR Electronic T1 What is unified validity theory and how might it contribute to research and practice with athlete self-report measures JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 1202 OP 1203 DO 10.1136/bjsports-2018-100027 VO 53 IS 19 A1 Johann Windt A1 David Taylor A1 Dustin Nabhan A1 Bruno D Zumbo YR 2019 UL http://bjsm.bmj.com/content/53/19/1202.abstract AB