1. Center for Research on Evaluation, Standards and Student Testing, School of Education, Campus Box 249, University of Colorado at Boulder, Boulder, Colorado 80309-0249. His area of specialization is educational measurement
2. Center for Research and Evaluation, Standards and Student Testing, University of California at Los Angeles, Los Angeles, CA 90024. Her areas of interest are instructional design, assessment, technology, and educational policy
3. University of Iowa, Iowa City, IA 52242. His areas of interest are educational measurement and statistics