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. Author manuscript; available in PMC: 2007 Mar 7.
Published in final edited form as: Med Care. 2000 Sep;38(9 Suppl):II28–II42. doi: 10.1097/00005650-200009002-00007

Table 7.

Potential Advantages of Using IRT in Health Outcomes Assessment

  • More comprehensive and accurate evaluation of item characteristics

  • Assess group differences in item and scale functioning

  • Evaluate scales containing items with different response formats

  • Improve existing measures

  • CAT

  • Model change

  • Evaluate person fit