David Z. Hambrick is professor in the Department of Psychology, Michigan State University, USA. His research on expertise has been widely published in scholarly journals and featured in the mainstream media, including The New York Times, The Boston Globe, and The New Yorker. He received his PhD in experimental psychology from the Georgia Institute of Technology in 2000, and is a Fellow of the Association for Psychological Science.

Guillermo Campitelli is senior lecturer in psychology at Edith Cowan University, Perth, Australia. His research aims to understand individual differences in performance, judgment and decision making, with a particular interest in the cognitive processes underlying expertise. He received this PhD in psychology from the University of Nottingham, UK, in 2003.

Brooke N. Macnamara is assistant professor in the Department of Psychological Sciences at Case Western Reserve University, Cleveland, Ohio, USA. Her diverse research interests include the acquisition of expertise, working memory, and bilingualism. She received her PhD in psychology from Princeton University in 2014.