He earned a PhD in psychology and a Master's degree in statistics with Jeffrey Rouder and Paul Speckman at the University of Missouri. His interests are three-fold: Bayesian cognitive modelling, Bayesian statistical inference, and the cognition of statistical evidence. He is the author of the BayesFactor (http://bayesfactorpcl.r-forge.r-project.org/) software for statistical inference, which allows Bayesian analysis of common research designs in the social and behavioural sciences.