Dr. Toplak's research spans cognitive science and clinical research. She studies cognitive science models of rational thinking and decision-making in typically developing samples and in developmental psychopathology. She has published over 50 peer-reviewed papers and book chapters across the fields of decision-making and clinical research, including two books: Individual Differences in Judgement and Decision-Making: A Developmental Perspective (Psychology Press, 2016) and The Rationality Quotient: Toward a Test of Rational Thinking (MIT Press, 2018), the latter of which won the 2017 PROSE Award in Education Theory.