Six papers on the use of partial credit item response theory score models in applied measurement settings are presented. These applications include the scoring of medical certification examinations using computer-based patient simulations, narrative writing tests, and educational diagnosis. (TJH)

Number-correct scoring was compared to empirical option weighting for estimating domain scores and making pass/fail decisions that are typical of certification, licensing, competency, and proficiency testing. The usefulness of the option-total correlation option-weighting method was illustrated with a sample of 1,000 high school students. (SLD)