Shared leadership: The Italian version of an overall cumulative scale validation.

Introduction Shared Leadership is an influence process in which all team members assume the responsibility to lead the team and perceive they lead each other to the achievement of group or organizational goals. This study aims to adapt the Italian version of the Shared leadership (SL) scale developed by Muethel and Gehrlein (2009). Method Data were collected in 2015/2016 (N = 224) and 2017/2018 (N = 220) in two samples of university students involved in team projects and team assignments, for a total of 118 different teams. Results Exploratory and Confirmatory factor analyses confirmed the original one-factor model, although is more supported a six items version of the scale. SL scale is also significantly related to team processes and team output variables, showing good nomological validity. Conclusions The adaptation shows internal validity and reliability and provides a first useful, new tool to measure SL in the Italian language.