AUTHOR=Wieczorek Alissa , Renner Karl-Heinz , Schrank Florian , Seiler Kirstin , Wagner Matthias TITLE=Psychometric Properties of the Mindfulness Inventory for Sport (German Version) JOURNAL=Frontiers in Psychology VOLUME=Volume 13 - 2022 YEAR=2022 URL=https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2022.864208 DOI=10.3389/fpsyg.2022.864208 ISSN=1664-1078 ABSTRACT=Mindfulness-based training programs are highly established in competitive and recreational sports. One of the best-known approaches is the Mindfulness-Acceptance-Commitment Approach (MAC; Gardner and Moore 2004, 2007), which integrates mindfulness aspects of awareness, non-judgmental attitude and focus. Based on these aspects, Thienot et al. (2014) developed and validated an English-language sports-specific questionnaire, the so-called Mindfulness Inventory for Sport (MIS), for the assessment of mindfulness skills in athletes. The aim of this study is to psychometrically test a German-language version of the MIS (MIS-D). To assess the psychometric properties, the MIS-D was examined in an online survey with an integrated test-retest design (n = 228) for reliability (internal consistency; test-retest reliability), validity (factorial; convergent) and measurement invariance (gender; competition type). The present results support the psychometric quality of the German-language version of the MIS. Necessary replications should amongst others focus on checking the measurement invariance for further relevant subgroups.