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Thomas Alexandre Langlois

Postdoctoral Associate

Massachusetts Institute of Technology (MIT) & NYU

UT Austin

Princeton University

University of California, Berkeley

Biography

Vision is an active process. Far from being passive recipients of external information, our visual systems are constantly generating meaning by combining sensory information with internal beliefs about the structure of the world around us. From the perspective of Bayesian statistics, these beliefs correspond to perceptual priors. My research centers around uncovering the hidden structure of subjective probability distributions and understanding the role that they play in perception and cognition. In particular, I investigate visual decision-making at the level of behavior, computation, and neural (biological) implementation. I am particularly interested in understanding the information-theoretic tradeoffs that shape our perceptual inferences.

For a representative example of my work probing visual memory priors, see my work in PNAS. For another example of my work exploring the neural (biological) basis of Bayesian inference during visual decision making, see my more recent work in PNAS. I also investigate how biological vision differs from computer vision systems. For a representative example of this work, see my oral presentation and paper in NeurIPS 2021. I am currently exploring the information-theoretic tradeoffs that govern how humans communicate about visual percepts using the Information Bottleneck (IB) Principle.

I completed my Ph.D. in Thomas Griffiths’ Computational Cognitive Science Lab at UC Berkeley in August of 2018. Prior to completing my Ph.D., I completed an M.S. in Computer Science (EECS), also at UC Berkeley. I then joined Princeton University as a postdoctoral researcher, where I developed experimental methods to estimate subjective probability distributions in visual memory. Next, I completed a postdoctoral fellowship at UT Austin in the Center for Perceptual Systems (CPS), where I worked in Robbe Goris’ group. I am currently a postdoctoral associate in the Brain and Cognitive Sciences Department (BCS) at MIT, where I am working with Roger Levy and Noga Zaslavsky on applications of the Information Bottleneck (IB) Principle. I am also a visiting scholar affiliated with the Department of Psychology at NYU.

Interests

  • Bayesian models of vision
  • Working memory priors
  • Visual psychophysics and serial reproduction
  • Computational models of cognition and perception
  • Interpretable A.I. and computer vision
  • Neural correlates of visual decision making
  • The Information Bottleneck (IB) principle

Education

  • PhD in Psychology (Cognition), 2018

    University of California, Berkeley

  • MS in Computer Science (EECS), 2018

    University of California, Berkeley

  • BA in Psychology (Cognitive Science), BA in Art History & Studio Art, 2008

    Georgetown University

Recent Publications

(2025). Bayesian Inference by Visuomotor Neurons in Prefrontal Cortex. In Proceedings of the National Academy of Sciences (PNAS) 122(13).

Preprint PDF

(2021). Passive Attention in Artifical Neural Networks Predicts Human Visual Selectivity. In Advances in Neural Information Processing Systems (NeurIPS), 35. Accepted (Oral), ArXiv preprint: 2107.07013.

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(2017). Uncovering visual priors in spatial memory using serial reproduction. In Proceedings of the 39th Annual Conference of the Cognitive Science Society.

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