doi:10.47197/retos.v73.116582spaGuillén Correas, RobertoGil Gil, ÁngelSerban, AdiMurillo Lorente, VíctorLapetra Costa, SusanaPueyo Romeo, LuisÁlvarez Medina, JavierElaboración y validación de un instrumento observacional para la evaluación de la técnica en la iniciación al snowboard (ETIS)ART-2025-146319Introduction: Snowboarding as a winter sport has experienced significant growth in popularity, both recreationally and competitively. This boom has generated the need to develop effective methodologies for teaching and learning basic techniques, especially at beginner levels. In this context, evaluating technique in the early stages is crucial as it directly influences safety, skill acquisition and the progression of the practitioner. Objective: to design and validate an observational tool that allows for the systematic evaluation of beginners' snowboarding technique. Methodological design: integrates the phases of construction, content validation through expert judgement, and inter- and intra-observer reliability analysis, following established methodological standards. Results: this research has the potential to provide a valuable tool for snowboard teaching, facilitating the identification of errors and areas for technical improvement and contributing to the development of more effective teaching strategies for beginners. Conclusion: it is hoped that this instrument will serve as a model for future research in winter sports, fostering scientific advancement and improving educational processes in this field, and promoting rigour and systematisation in the design of sports assessment tools.2025http://zaguan.unizar.es/record/16417710.47197/retos.v73.116582http://zaguan.unizar.es/record/164177oai:zaguan.unizar.es:164177Retos 72 (2025), 458-469by-nc-ndhttps://creativecommons.org/licenses/by-nc-nd/4.0/deed.esinfo:eu-repo/semantics/openAccess