The purpose of this study was twofold: to investigate to what extent characteristics of anchor tests may affect precision of item calibration, and to estimate to what extent precision of item calibration may be affected by removal of persons whose response patterns deviate from those normally expected from the Rasch one-parameter logistic model.…

The SAT I: Reasoning Test was introduced in March 1993 for the national testing program of academic preparation and ability of college applicants, including students with disabilities. A survey was administered to 1,001 students with disabilities participating in a field trial of the SAT I prototype test. Students' disabilities were in the areas…

This paper reports the results of an SAT I field trial which examined test performance and efficiency of test timing for students with disabilities. A prototype SAT I test was administered to 1,113 students with disabilities in December 1992, in special formats and using special accommodations, to obtain information about the level of performance…