Psychometric Validation of Teacher Educators’ Self-Assessment Test Scale for Quality and Equity in Spiritual Values Assessment

Psychometric validation of instruments measuring spiritual values in education is critical for ensuring fairness and quality in assessments within the Nigerian educational system. Spiritual values are integral to teacher educators, shaping their influence on students' moral and ethical development. This study aimed to validate the Teacher Educators Self-Assessment Test (TEDSAT) instrument using the Rasch Model for evaluating equity and quality in spiritual values assessment. The 25-item, four-point Likert-scale instrument underwent expert content validation, yielding strong content validity indices (I-CVI: 0.72–0.92). A pilot test with 37 teacher educators revealed moderate reliability (Cronbach’s alpha: 0.70; item reliability: 0.77). Rasch analysis assessed item fit, unidimensionality, and difficulty levels. The findings showed that while the TEDSAT scale demonstrated overall validity and reliability, certain items required refinement for optimal performance. The study concludes that psychometric validation is essential for fair assessments of teacher educators’ spiritual values, supporting quality educational practices in Nigeria.