The Teacher Belief Q-sort method offers an advantage as it is less susceptible to bias than traditional questionnaire methods. Both the reliability and construct validity (both convergent and discriminant validity) appear high. The measure is more fully explained in Rimm-Kaufman, S. E., Storm, M., Sawyer, B., Pianta, R. C., & La Paro, K. M. (2006). The Teacher Belief Q- Sort: A measure of teachers’ priorities and beliefs in relation to disciplinary practices, teaching practices, and beliefs about children. Journal of School Psychology, 44 (2), 141-165. Abstract