1. Using Multidimensional Item Response Theory to Understand What Items and Tests Are Measuring
2. Bogan, E. D. & Yen, W. M. (1983). Detecting multidimensionality and examining its effects on vertical equating with the three-parameter logistic model. Monterey, CA: CTB/McGraw-Hill. (ERIC Document Reproduction Service No. ED 229 450)
3. The Effects of Dimensionality on Equating the Law School Admission Test
4. Cook, L. L., Dorans, N. J., Eignor, D. R. & Petersen, N. S. (1985). An assessment of the relationship between the assumption of unidimensionality and the quality of IRT true-score equating (Research Report No. RR-85-30). Princeton, NJ: Educational Testing Service.