Supervision is a new profession both worldwide and in Latvia. Supervision serves the professional development of individuals, teams and organizations. The significance and importance of supervision is widely acknowledged. Therefore, one of the most important challenges is measurement of supervisors’ professional competences.

However, there is a lack of such available instruments, which measure supervisors’ professional competences and can be appropriate in the multicultural context. Therefore, this study aims to introduce a new instrument – the Supervisors’ Professional Competences Questionnaire (SPCQ), and to determine its psychometric properties.

The SPCQ was developed on the base of the description of supervisors’ core qualities and competences provided in “A European Glossary of Supervision and Coaching†and “A European Competence Framework of Supervision and Coaching†(Ajdukovic et al., 2015) - two publications produced in the framework of the LEONARDO – Development of Innovation Project “ECVision. A European System of Comparability and Validation of Supervisory Competencesâ€. The SPCQ is designed to measure self-evaluations of professional competences of supervisors.

The sample consisted of 110 Latvian supervisors which worked in different professional settings. Participants completed the questionnaire and evaluated their professional competences using a 4-point Likert scale. The questionnaire was in Latvian.

The factorial validity of the SPCQ was established using principal components analysis with varimax rotation; this yielded nine factors, which can be interpreted as Building a Professional Relationship, Facilitating Outcomes, Performing Advanced Communication, Handling Diversity, Mastering Settings, Techniques and Methods, Perspective on Person, Work and Organization, Professional Attitude, Ethical Conduct, Continuous Professional and Personal Development. The component analysis of the items supported the factors the SPCQ was designed to measure.

All the SPCQ scales had acceptable or good internal consistency (Cronbach’s alpha coefficients for all scales were above .70). The reaction and discrimination indices satisfied the accepted psychometric criteria.

The further stage of the SPCQ development would be the confirmatory factor analysis based on data from a larger and more representative sample, the convergent validity establishing, and test-retest reliability examination.