Erratum

Abstract

The author of the above article was informed that the entries of the approximate posterior standard deviations in Table 1 were too small and that the effects of the prior distributions should be lower than those shown in Table 1 (F. J. Abad, personal communication, October 13, 2009). The author found out that the FORTRAN implementation of Equation 6 under the one-parameter logistic model contained an error. Hence, the earlier Table 1 on page 264 and Figure 1 on page 272 should be replaced with the following new Table 1 and Figure 1, respectively. In addition, the fourth sentence on page 272 should be replaced with the following sentence: “Under Prior Specification 2 (e.g., the default setting of BILOG), assuming that the item discrimination is 1.5 and item difficulties are located within a reasonable range from -2 to 2, a sample of 2,500 is needed for the one-parameter logistic model in the Bayes modal estimation with the normal prior on b, and a sample size of nearly the same but slightly more than 2,500 is needed in the maximum likelihood estimation for the one-parameter logistic model.” The author thanks Professor Abad at the Universidad Automona de Madrid, Spain, for his careful reading of the article.