Test–Retest Reliability and Minimum Detectable Change of the Athletic Trainers’ Self-Confidence Scale

The Athletic Trainers’ Self-Confidence Scale (ATSCS) is a nine-item Likert-scale questionnaire assessing the respondent’s level of agreement with statements regarding confidence in recognizing and managing exertional heat illnesses. Test–retest reliability of this instrument has not yet been established. The purpose of this study was to investigate the internal consistency, test–retest reliability, and minimum detectable change score for the composite score of the ATSCS. A total of 18 professional master of science in athletic training students (nine first-year and nine second-year students) completed the ATSCS at three testing sessions with 48 hr between sessions. The nine items of the ATSCS demonstrated good internal consistency (α = .86; 95% confidence interval [.78, .94]). The composite scores of the ATSCS demonstrated moderate test–retest reliability (intraclass correlation coefficient = .75; 95% confidence interval [.497, .893]). The calculated minimal detectable change for the composite change score was 6.19. The ATSCS has good internal reliability as well as test–retest reliability. These results display that the tool will provide consistent, reliable results of changes in athletic training students’ self-confidence.