Psychometric Properties and Reliability of the Referee Self-Efficacy Scale (REFS) in Volleyball Referees.

Although English was not the mother tongue for most of the subjects in the sample, the scale was statistically reliable, and the items were easy to understand, thus making the tool very suitable to use for further studies on multilingual referees. The study also suggests enhancing the level of education of the officials because of its significant effect on the perceived self-efficacy during refereeing.