Richard E. Mayer is Distinguished Professor of Psychological and Brain Sciences at the University of California, Santa Barbara, USA. He served as President of Division 15 (Educational Psychology) of the American Psychological Association and Vice President of the American Educational Research Association for Division C (Learning and Instruction).

Logan Fiorella is Associate Professor of Educational Psychology at the University of Georgia, USA. He is a National Academy of Education/Spencer postdoctoral fellow and a fellow of the Psychonomic Society. He has also served as PI or Co-PI on grants from the National Science Foundation, the Institute of Education Sciences, and the Spencer Foundation.