The notion of teacher professional identity has become a regular fixture in numerous theoretical and empirical studies in both mainstream and L2 teacher education. Consequently, a number of scales have been designed and developed to quantify this construct. To be sure, the extant instruments are general with regard to both context and subject matter, and this line of inquiry has not addressed the quantification of the concept in the ELT profession. The present study was, therefore, an attempt to provide a (re)conceptualization of L2 teachers’ professional identity through exploring its underlying components. To this end, an initial 61-item, self-assessment questionnaire was developed using a comprehensive review of the related literature and experts’ opinion. The trial scale was then administered to a sample of 676 ELT teachers. Results of exploratory factor analysis reduced the instrument to 42 items, leading to a six-factor model which indicated that L2 teacher identity includes: researching and developing one’s own practice; language awareness; institutional and collective practice; engaging learners as whole persons; appraising one’s teacher self; and sociocultural and critical practice. Confirmatory factor analysis substantiated the resultant six-factor model as a robust and valid tool for measuring ELT teachers’ professional identity.
