Bruce Aaron, PhD, has more than 20 years of program evaluation experience, and has presented at international conferences of organizations such as ASTD, ISPI, SALT, AERA, FERA, EERA, AEA, and The Psychometric Society. Aaron has authored or co-authored dozens of presentations, articles, chapters, and books, including Isolation of Results: Defining the Impact of the Program with Jack Phillips, and a chapter for The ASTD Handbook of Measuring and Evaluating Training.