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Effect of the Guessing Parameter on the Estimation of the Item Discrimination and Difficulty Parameters When Three-Parameter Logistic Model Is Assumed.

Samejima, Fumiko – 1986

Item analysis data fitting the normal ogive model were simulated in order to investigate the problems encountered when applying the three-parameter logistic model. Binary item tests containing 10 and 35 items were created, and Monte Carlo methods simulated the responses of 2,000 and 500 examinees. Item parameters were obtained using Logist 5.…

Descriptors: Computer Simulation, Difficulty Level, Guessing (Tests), Item Analysis

Performance Envelopes and Optimal Appropriateness Measurement.

Levine, Michael V.; Drasgow, Fritz – 1984

Some examinees' test-taking behavior may be so idiosyncratic that their scores are not comparable to the scores of more typical examinees. Appropriateness indices, which provide quantitative measures of response-pattern atypicality, can be viewed as statistics for testing a null hypothesis of normal test-taking behavior against an alternative…

Descriptors: Cheating, College Entrance Examinations, Computer Simulation, Estimation (Mathematics)