This study aims to improve the effectiveness of coaching by enhancing the quality of coaching sessions. We developed and validated a formative evaluation measurement scale to assess the quality of coaching based on coaches’ skills, attitudes, and approaches from both coach and coachee perspectives.
We developed this tool through two studies: In Study 1, we generated scale items and conducted item reduction. We evaluated the scale’s factor structure, reliability and validity using a sample of 478 coach respondents. In Study 2, we assessed the scale’s factor structure and validity with 284 coachee respondents.
The 31-item Coaching Session Evaluation Scale (CSES) showed good model fit and reliability. The validation and nomological network assessment found a positive correlation between CSES scores and coaching relationship quality, goal attainment and action clarity.
CSES enhances coaching evaluation by providing a formative approach assessment. Moreover, it enables evaluation from both parties of the coaching session, a coachee and a coach, based on the same evaluation framework. The scale contributes to the improvement of the session, which eventually results in a better or desired coaching outcome.
