Statistics and Psychometrics
AIR has an ongoing advanced psychometrics research and development program that works alongside day-to-day operations. This results in better-designed field tests, more stable calibrations, more accurate equating and linking, and more sophisticated use of the data.
Our active research and development program ensures that our clients benefit from advances in psychometrics.
AIR uses scientific sampling for field tests and advanced models for linking and equating to ensure stable test results. We customize our approach to the specific needs of each assessment program to obtain the best possible data and statistics.
We use advanced statistics to present data that can be used to improve teaching and learning.
AIR uses advanced statistical methods to get the most information from the data. Some examples of this include studies on international linking, value-added models under the umbrella of NCLB, and measuring real growth among special student populations.
From the outset, AIR has been a significant contributor to the research and early implementation work surrounding student growth and value-added models. View Video
Currently, we are helping states and districts implement these models under aggressive timelines. Clients benefit from our robust infrastructure for estimating, evaluating, modifying, and enhancing any value-added model currently in use, as well as our expertise in selecting a value-added model or fashioning it to specific needs.
AIR is working with national and international organizations to benchmark U.S. tests against international tests.
Our psychometricians, led by Dr. Gary Phillips, have conducted many statistical studies that link NAEP to international tests, and we are currently working to benchmark individual state tests to international standards.