My research involves the development, evaluation, and application of models of cognition including representation, memory, learning, and decision making, with a special focus on individual differences and collective cognition. Much of my research uses naturally occurring behavioral data, and tries to pursue a solution-oriented approach to empirical science, in which the research questions are generated from real-world problems. My methods involve probabilistic generative modeling, and Bayesian methods of computational analysis. Appointments Previous: Action Editor, Cognitive Science; Action Editor, Journal of Mathematical Psychology; Editorial Board, Psychological Review; Editorial Board, Psychonomic Bulletin & Review; Editorial Board, Journal of Problem Solving Current: Action Editor, Judgment and Decision Making; Editorial Board, Behavior Research Methods; Editorial Board, Decision Academic Distinctions William K. Estes Early Career Award, Society for Mathematical Psychology, 2003. Honorable mention, David Marr Prize, Cognitive Science Society, 2004. University of Leuven fellowship, 2009. President, Society for Mathematical Psychology, 2010. Best Applied Cognitive Modeling Paper Prize, Cognitive Science Society, 2011. Best paper award, Journal of Mathematical Psychology, 2017.