The Teacher Self-Efficacy Scale (TSES) Factorial Structure Evidence Review and New Evidence From Polish-Speaking Samples

Abstract. The Teacher Self-Efficacy Scale (TSES) is a widely accepted and enthusiastically used measurement instrument. Unfortunately, little firm evidence is available to support its factorial structure. The article reports on the results of the TSES administered to large representative samples of primary (2,083) and lower-secondary school teachers (2,382) in Poland, along with the results of reanalyzed US data, based on which the scale was developed. The results support TSES as a reliable instrument applicable across countries. However, they also highlight the importance of analyzing the factorial structure of the scale with each application, as it may require modifications when administered to different samples. Additionally, moderate evidence was found in Polish data for TSES to be invariant between primary and lower-secondary school teachers.