Davis, L. L., & Dodd, B. G.. (2003). Item exposure constraints for testlets in the verbal reasoning section of the MCAT. Applied Psychological Measurement, 27, 335-356.

Embretson, S. E. (2002). Generating abstract reasoning items with cognitive theory. In P. Kyllomen, Item generation for test development (pp. 219-250). Mahwah, N.J. USA: Lawrence Erlbaum Associates, Inc.

Smith, R. W. (2000). An exploratory analysis of item parameters and characteristics that influence item level response time. Dissertation Abstracts International Section A: Humanities and Social Sciences, 61, 1812.