1. Lord, F. M., & Novick, M. R. (1968). Statistical theories of mental test scores. Addison-Wesley.
2. Embretson, S. E., & Reise, S. P. (2000). Item response theory for psychologists. Lawrence Erlbaum Associates.
3. Fries, J. F., Bruce, B., & Cella, D. (2005). The promise of PROMIS: Using item response theory to improve assessment of patient-reported outcomes. Clinical and Experimental Rheumatology, 23(5 Suppl 39), S53–S57.
4. Choi, S. W., Schalet, B., Cook, K. F., & Cella, D. (2014). Establishing a common metric for depressive symptoms: Linking the BDI-II, CES-D, and PHQ-9 to PROMIS depression. Psychological Assessment, 26, 513–527. https://doi.org/10.1037/a0035768
5. Samejima, F. (1969). Estimation of latent ability using a response pattern of graded scores. Psychometric Monographs. https://doi.org/10.1002/j.2333-8504.1968.tb00153.x