Martin, M. O., Mullis, I. V. S., Hooper, M., Yin, L., Foy, P., Fishbein, B., & Liu, J. (2017). Creating and Interpreting the PIRLS 2016 Context Questionnaire Scales. In M. O. Martin, I. V. S. Mullis, & M. Hooper (Eds.), Methods and Procedures in PIRLS 2016 (pp. 14.1-14.106). Retrieved from Boston College, TIMSS & PIRLS International Study Center website: https://timssandpirls.bc.edu/publications/pirls/2016-methods/chapter-14.html