A. General questions

Q1. I have trouble downloading the dataset. Where can I download the whole dataset?

A1: You may download the whole dataset (dataset.zip) here.

Q2. Where can I obtain the manual for DETECT, DIMTEST, or SIBTEST?

A2: Please contact Educational Measurement Laboratory (also known as Statistical Laboratory for Educational and Psychological Measurement) or Assessment Systems Corporation.

Q3. Where can I obtain a copy of the EQUATE99 program?

A3: Please contact Frank Baker at University of Wisconsin at Madison.

Q4. How can I obtain a copy of this unpublished manuscript by Levine, M. V., & Williams, B.A. (1993). Nonparametric models for polychotomously scored item responses: Analysis and integration?

A4: The technical report eventually became part of the 1995 Applied Psychological Measurement article.