Elman Prize

Scientific Achievements

Wei Ji Ma has made impressive contributions to Cognitive Science in a number of areas, including perceptual decision making, neural coding and computation, working memory, and planning. He has a long-standing interest in how humans make perceptual decisions and, in particular, the extent to which such decisions correspond to an ideal Bayesian observer that takes into account noisy measurements, estimates of measurement uncertainty, prior knowledge, and the costs and benefits of outcomes. In his research, Wei Ji has contributed to our understanding of the limits of Bayesian models when computational requirements become extensive, and perceptual decision making in dynamic environments and multi-sensory contexts. He was part of a team that made fundamental contributions to the theoretical basis of neural computation in the “Bayesian brain” paradigm. This work was a team effort, but Wei Ji was the lead author of by far the most important article in this stream, the Nature Neuroscience 2006 classic on probabilistic population codes that already has been cited almost 1,400 times. Furthermore, his work on probabilistic models of visual working memory is particularly noteworthy. Wei Ji demonstrated how computational models can resolve much of the controversy between slot-based and continuous-resource accounts, in part by elucidating when existing experiments could not effectively discriminate between these accounts, and then by designing innovative discriminating experiments guided precisely by his computational models. Overall, Wei Ji’s research stands out because of its beautiful interplay between theory and experiment, connected by exemplary mathematical rigor and clear common-sense thinking.

Community Building

Wei Ji Ma’s community building efforts are numerous, diverse, and inspiring. They include multiple innovative mentoring efforts within his and other universities, as well as working with the general public in multiple ways. Wei Ji is the Co-Director of the Training Program in Computational Neuroscience, funded by a five-year NIH training grant. He co-founded the “Growing Up in Science” mentorship series, and he organizes and moderates this series for Psychology, the Center for Neural Science, and Neuroscience at NYU. In these seminars, faculty members tell their personal career story to students and postdocs, emphasizing the difficulties they faced and how they overcame them. This helps trainees to realize that most paths to an academic career are winding and full of potholes, so if they themselves are facing doubts and difficulties, that does not mean they cannot succeed in academia. “Growing Up in Science” has been replicated at greater than 30 other universities. Outside of academia, Wei Ji is a founding member and leader of the Scientist Action and Advocacy Network (ScAAN; www.scaan.net). ScAAN is a group of New York area scientists who provide pro bono science consultation and data analysis services to non-profit social progress organizations by writing knowledge briefs for lay audiences, and by analyzing and visualizing data. As part of this, Wei Ji led the production of a knowledge brief for Raise the Age (raise the age of criminal responsibility from 16 to 18 years old in New York State, which was passed in 2018), and he testified in front of New York City Council committees. He also led a partnership between ScAAN and BagItNYC to ban single-use plastic bags from New York State (which came into effect in 2020). Wei Ji also is a founding member of NeuWrite NYU, a consortium of neuroscientists and writers who meet monthly to workshop neuroscience writings for general audiences. Finally, he co-founded and is the Chairperson of the Rural China Education Foundation (www.ruralchina.org), which works to improve the relevance of education in rural China to children’s lives.