Coaching is a complex and diverse profession with a wide range of uses. Despite determining the approach to coaching, examining the core competencies of coaches is rarely explored. The aim of this study was to design and validate the CCC3 methodology (the three core competencies of a coach). The research sample consisted of 387 respondents for the exploratory factor analysis and 532 respondents for the confirmatory factor analysis. The confirmatory factor analysis proved the existence of three factors that cover a coach's core competencies, namely, F1-effective communication and awareness creation, F2-relationship creation and active listening, and F3-laying the foundations. The study also provides an overview of the applicability of the CCC3 methodology in coaching practice. Exploratory and confirmatory factor analysis made it possible to create a 24-item model that describes the core competencies of a coach. The verified questionnaire can be used as a tool to assess the key, i.e., the core competencies of a coach, which represent the basis for the coaching approach, enriching the issue of coaching on a practical level. It is possible to use the methodology in management and education but also wherever it is necessary to evaluate the core competencies of a coach.
Keywords: coaching; core competencies; factor analysis; methodology; questionnaire.