WHO AM I AS A TEACHER? DEVELOPMENT AND VALIDATION OF AN INDONESIAN TEACHERS’ PROFESSIONAL IDENTITY SCALE
Keywords:
Rasch Model, Teachers Professional Identity, Instrumen Validity, Indonesian TeachersAbstract
A teacher's professional identity not only reflects a teacher's understanding of his or her role, but also shapes the way teachers respond to job demands, make professional decisions, and maintain commitment to teaching practice. A strong professional identity contributes to the quality of learning and the sustainability of the teaching profession, while a weak identity can hinder teacher performance and well-being. This study aims to validate the Indonesian Teachers' Professional Identity Scale (ITPIS) in teachers in Indonesia. The instrument consists of 37 items. Data were collected through questionnaire filling and analyzed using the Rasch model to evaluate the reliability, item fit, as well as psychometric characteristics of the instrument. The results of the analysis showed good psychometric quality, with a Cronbach’s alpha of 0.91 and internal consistency and strong response stability. These findings confirm that ITPIS is a valid and reliable instrument to measure the professional identity of teachers in the context of Indonesian education.
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