A THEORETICAL STUDY OF THE MEASUREMENT EFFECTIVENESS OF FLEXILEVEL TESTS*
Frederic M. Lord · ETS Research Bulletin Series · 1971
ABSTRACT A flexilevel test is found to be inferior to a peaked conventional test for measuring examinees in the middle of the ability range, superior for examinees at the extremes. Throughout the entire range of ability, a flexilevel test is much superior to any conventional test that attempts to provide accurate measurement at both extremes.