This information was produced by the staff of the Belin-Blank International Center for Gifted Education and Talent Development (B-BC) at the University of Iowa ( The resources and information listed here are for informational purposes; there is no direct or implied endorsement by the B-BC. Services provided by the B-BC include programs for academically talented K-12 and college students, professional development for teachers, the Assessment and Counseling Clinic, the Acceleration Institute (, and graduate programs and research in gifted education.

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IAS Studies

IAS Validation Studies

The effectiveness of the IAS as a decision-making instrument has been validated in multiple studies. These studies are reported in A Nation Deceived (Vol. II), Appendix D (PDF).

NAGC 2007

Results demonstrating the effectiveness of the IAS were presented at the 2007 National Association of Gifted Children in a talk titled "Evaluating the Effectiveness of the Iowa Acceleration Scale (IAS) in Determining the Appropriateness of Whole-Grade Acceleration" (PPT).