Development and Calibration of an Item Response Model that Incorporates Response Time

Tianyou Wang, ACT, Inc.
Bradley A. Hanson, ACT, Inc.

Paper presented at the 2001 Annual Meeting of the American Educational Research Association (Seattle, April)

Summary:This paper proposed an item response model that incorporates response time. A parameter estimation procedure using the EM algorithm was developed. The procedure was programmed and evaluated with both real and simulated test data. The results suggest the estimation procedure works well in estimating model parameters. By utilizing response time data, estimation of person ability parameters can be improved. Potential applications of this model are discussed. Directions for further study are suggested.

Links: The description of the EM algorithm for the model incorporting response times is based on a description of the EM algorithm given in Woodruff and Hanson (1997).

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