A THEORETICAL STUDY OF TWO-STAGE TESTING
EDUCATIONAL TESTING SERVICE PRINCETON NJ
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When items cannot be answered correctly by guessing, certain two- stage testing procedures are about as effective over the ability range of interest as the best up-and-down procedures studied previously. A two-stage testing procedure consists of a routing test followed by one of several alternative second-stage tests. The choice of the second-stage test administered is determined by the examinees score on the routing test. The study attempts to find, under specified restrictions, some good designs for two- stage testing. A good procedure is one that provides reasonably accurate measurement for examinees who would obtain near-perfect or near-zero scores on a conventional test.