NCEO Data Viewer: This tool lets you view information on state accommodations policies and create individualized reports based on criteria that you can choose.
NCEO Accommodations Bibliography: This searchable database allows you to search a compilation of empirical research studies on the effects of various testing accommodations for students with disabilities.
Publications available at NCEO's Web site (the publications are listed chronologically, with the most recent first; Policy Directions give a general overview of the issues and other publications provide greater depth):
For reports before 2007, see NCEO's Archived Publications.
NCEO and Assessing Special Education Students (ASES) State Collaborative on Assessment and Student Standards (SCASS):
Accommodations Manual: How to Select,
Administer, and Evaluate Use of Accommodations
for Instruction and Assessment of Students with
Accommodations in the 21st Century: Critical Considerations for Students with Disabilities
Council of Chief State School Officer (CCSSO) publications:
Improving Accommodations Outcomes:
Monitoring Instructional and Assessment
Accommodations for Students with Disabilities
Designing Accessible Reading Assessments publications:
Using Factor Analysis to Investigate the Impact of
Accommodations on the Scores of Students With
Disabilities on English-Language Arts Assessments
State Research (NCEO Funded)
Kansas conducted a set of studies that considered the effects of language
complexity and the use of calculators on the statewide assessment
performance of students with disabilities.
Kansas Accommodations Research Report
Rhode Island examined IEP team accommodation decision-making practices.
Significant differences were found between the provision of instructional
and assessment accommodations.
Rhode Island Accommodations Research Report
West Virginia examined the test performance of students with different
disabilities and in various least restrictive environments as they differed
according to testing conditions.
West Virginia Accommodations Research Report
Minnesota Department of Education publications:
Minnesota Manual of Accommodations for Students with
Disabilities: A Guide to Selecting, Administering, and
Evaluating the Use of Accommodations
Minnesota Manual of Accommodations for Students with Disabilities: A Guide to Selecting, Administering, and Evaluating the Use of Accommodations: Training Guide
National Center for Learning Disabilities (NCLD) publications:
State Testing Accommodations: A Look at Their Value and Validity
Determining Appropriate Assessment Accommodations for Students with
Disabilities provides an overview of appropriate accommodations for students
with IEPs or 504 Plans, serves as a guide to choosing accommodations and
suggests questions to ask when making appropriate accommodation decisions.
Partnership for Accessible Reading Assessments
Bolt, S., Roach, A. T., & Quenemoen, R. F. (2008). Inclusive assessment and accountability: A guide to accommodations for students with diverse needs. New York, NY: The Guilford Press.
Cahalan-Laitusis, C., & Cook, L. (Eds.). (2007). Accommodating students with disabilities on state assessments: What works? Arlington, VA: Council for Exceptional Children.
Elliott, J. L., & Thurlow, M. L. (2006). Improving test performance of students with disabilities on state and district assessments (2nd ed.). Thousand Oaks, CA: Corwin Press.
Johnstone, C., Thurlow, M., Altman, J., Timmons, J., & Kato, K. (2009). Assistive technology approaches for large-scale assessment: Perceptions of teachers of students with visual impairments. Exceptionality, 17(2), 66-75.
Ketterlin-Geller, L. R., Alonzo, J. Braun-Monegan, J. & Tindal, G. (2007). Recommendations for accommodations: Implications of (in)consistency. Remedial and Special Education. 29(4), 194-206.
Ketterlin-Geller, L. R. Yovanoff, P., & Tindal, G. (2007). Developing a new paradigm for conducting research on accommodations in mathematics testing. Exceptional Children, 73, 331-347.
Lang, S. C., Kurnke, P. J., Ray, C. E., Cowell, E. L., Elliott, S. N., Kratochwill, T. R., et al. (2005). Consequences of using test accommodations: Student, teacher, and parent perceptions of and reactions to testing accommodations. Assessment for Effective Intervention, 31, 49-62.
Lazarus, S. S., Thurlow, M. L., Lail, K. E., & Christensen, L. (2009). A longitudinal analysis of state accommodations policies: Twelve years of change 1993-2005. Journal of Special Education. 43(2), 67-80.
Shriner, J. G., & Ganguly, R. (2007). Assessment and accommodation issues under the No Child Left behind Act and the Individuals with Disabilities Education Improvement Act: Information for IEP teams. Assessment for Effective Intervention, 32(4), 231-243.
Sireci, S. G. (January/February 2005). Unlabeling the disabled: A perspective on flagging scores from accommodated test administrations. Educational Researcher 34(1), pp. 3-12.
Sireci, S. G., Scarpati, S., & Li, S. (2005). Test accommodations for students with disabilities: An analysis of the interaction hypothesis. Review of Educational Research, 75(4), 457-490.
Smith, D. W., & Amato, S. (2012). Synthesis of available accommodations for students with visual impairments on standardized assessments. Journal of Visual Impairment & Blindness, 106(5), 299-304.
Thurlow, M. L., Lazarus, S. S., & Christensen, L. L. (2008). Role of assessment accommodations in accountability. Perspectives on Language and Literacy, 34(4), 17-20.
Thurlow, M. L., Thompson, S. J. & Lazarus, S. S. (2006). Considerations for
the administration of tests to special needs students: Accommodations,
modifications, and more. In Downing, S.M. & Haladyna, T.M. (Ed.), Handbook
of test development (653-673).Mahwah NJ: Lawrence Erlbaum, Inc.