Joshua R. Polanin is a principal researcher in the Research and Evaluation program at AIR. He has extensive experience in quantitative methodology, and has led or co-led more than 15 peer-reviewed, published meta-analyses. Dr.
Donna Warthan is a senior technical consultant at AIR. Her primary responsibilities include managing the overall project and budget for four federal School Improvement Grant projects in Virginia and New York.
Ryan Williams is a principal researcher at AIR with expertise in causal inference methods and meta-analysis. Dr. Williams is the principal investigator on an Institute for Education Sciences (IES) meta-analysis that explores sources of heterogeneity in mathematics intervention effects.
Alicia Espinoza is a senior technical assistance consultant at AIR. Her expertise includes coaching teacher leaders, school administrators, and district leaders through the implementation of evidence-based district and school improvement systems, processes, and practices.
Felice Trirogoff is a communications specialist at American Institutes for Research (AIR), where her primary responsibilities include reviewing, editing, proofreading, and writing deliverables and public information materials.
Seth Brown is a senior researcher at AIR.
David English is a technical assistance consultant at AIR supporting its work on Student Learning Objectives. He joined the AIR staff in the summer of 2014. Most recently, he worked for the U.S.