Psychometric properties and validation of the Polish adaptation of the Sources of Sport-Confidence Questionnaire (SSCQ-PL)

Zuzanna Gazdowska , Dariusz Parzelski , Robin Vealey

Abstract

The aim of the study was to validate and adapt the Sources of Sport-Confidence Questionnaire (SSCQ-PL) for use in Poland. The original tool (SSCQ) was created by Robin Vealey (1998) and consists of 41 items grouped into 9 subscales that each describes individual sources of sport-confidence. This paper describes the phases of the adaptation process. A total of 353 Polish athletes participated in the study, including active sportsmen, amateurs and professionals. The results confirm satisfactory psychometric properties of the Polish adaptation. The reliability and discriminatory power of the items was high. However, the authors decided to exclude the Situational Favorableness scale, which significantly decreased the reliability of the Polish version of the questionnaire. The internal validity of SSCQ-PL was confirmed using a confirmatory factor analysis. The SSCQ-PL scales correlated with most of the Multidimensional Self-Esteem Inventory (MSEI) scales and with the Trait Sport-Confidence Inventory-PL (TSCI-PL) scales, which confirmed the criterion validity of the tool.