An error discovered in the item response theory (IRT) scale analysis for the 1997 NAEP visual arts assessment has been corrected. Changes were made to values in Figures 4.7 and 4.8 in Chapter 4, and five statements regarding significant differences were also corrected in Chapter 4. Some values were changed in Tables 6.2, 6.5, 6.8, 6.11, and 6.14 in Chapter 6. Some values were also changed in Tables 7.1, 7.2, 7.4, 7.5, 7.9, and 7.13 in Chapter 7. Finally, some changes in values were made to Figure B4.7 and to Tables B6.2, B6.5, B6.8, B6.11, B6.14, B7.1, B7.2, B7.3, B7.4, B7.5, B7.9, and B7.13 in Appendix B.