Principal Investigator
Dobromir (Doby) Rahnev, Ph.D.
E-mail: rahnev@psych.gatech.edu
Research Interests: Perceptual decision making, prefrontal cortex, metacognition, computational models of cognition
About me: I enjoy soccer, hiking, juggling, and math puzzles.
Postdocs
Marshall Green
E-mail: marshall.l.green [at] outlook [dot] com
Research Interests: I am interested in perceptual decision-making and metacognition. To study these topics, I combine psychophysics and computational modeling to test and develop theories of perception. My recent work has been focused on motion and orientation perception, summary statistics, and visual confidence.
About me: I earned my Ph.D. in Cognitive Science from Mississippi State University where I researched visual perception and visual working memory. I am married to a wonderful woman named Jenn, who is a talented graphic designer. My hobbies include playing violin, cooking, photography, and hiking.
Graduate Students
Sean Zheng
E-mail: seann0820@gmail.com
Research Interests: I am interested in how people become aware of themselves and the external environment. I am also interested in how people metacognitively monitor and control their own decision-making processes. I would like to use behavioural experiments, multimodal neuroimaging methods and computational models to answer these questions of interests.
About me: I love coffee, reading, Lego, stand-up comedy, Peanuts (comic), Japanese TV dramas, and Arsenal football club.
Kai Xue
E-mail: kxue33@gatech.edu
Research Interests: I am interested in how visual system is able to perceive information and make decisions. I want to integrate computational modeling, neuroimaging techniques, and behavioral experimentation to understand how visual system understands and reasons actions.
About me: I play the piano and the flute. For sports, I play table tennis.
Herrick Fung
E-mail: herrickfung@gatech.edu
Research Interests: I’m fascinated by the binding problem of visual perception and consciousness, as well as the neural mechanisms underlying subjective perception. I’m currently working on projects exploring individual differences in perception and neural networks, alongside separate work on confidence.
About me: I’m an indoor creature by nature—music, books, brain games—but lately I’ve been dragging myself outside for some much-needed exercise.
Bogeng Song
E-mail: bsong91@gatech.edu
Research Interests: I am interested in visual perception and perceptual decision-making. I want to use machine learning models, especially deep learning methods, as tools to understand the brain and mind. My project integrates behavioral and computational modeling approaches to study people's perception and decision making.
About me: I love reading, I double major Chinese Language and Literature and Psychology when I was in college. I like playing and watching basketball (OKC Thunder), I like FPS gaming (Counter-Strike), I love Broadway show, old Rock music and Asian pop music (Vaundy, New Jeans).
Alish Dipani
E-mail: alishdipani@gatech.edu
Research Interests: I am interested in understanding the computational principles and learning algorithms leading to generalization in natural and artificial agents, especially their cognitive and visual systems. Towards this, I collect neuroimaging and behavioural data from various populations, and build deep learning models. At Georgia Tech, I am a CoCo Fellow, funded by the Center of Excellence in Computational Cognition.
About me: Outside of research, I like teaching, mentoring, open-source development, cooking, traveling, and spending time with my cats.
Undergraduate Research Assistants
Girish Jayakumar
E-mail: gjayakumar3@gatech.edu
Research Interests: I am deeply involved in bridging machine learning, autonomous systems, and human-computer interaction to enhance real-world applications and decision-making processes. Currently, I am focused on the resilience of neural networks against adversarial attacks. My project investigates the robustness of RTNet, a newly developed ANN that generates stochastic decisions and human-like response time (RT) distributions, and its capabilities compared to standard neural networks.
About me: I am a computer science student at Georgia Tech with concentrations in Intelligence and HCI. Over the years, I have visited over 20 national parks, and I enjoy hiking and engaging in outdoor activities. In my spare time, I love to exercise, read, watch movies, play tennis and racquetball, and volunteer to help Atlanta-based nonprofits.
Lab Alumni
Yi Gao : Postdoc (2021-2025). Next position: Assistant professor at University of Nebraska Omaha.
Medha Shekhar: Postdoc (2023-2025). Next position: Postdoc at Free University of Brussels.
Nadia Haddara: Ph.D. student (2018-2024).
Johan Nakuci: Postdoc (2020-2023). Next position: Postdoctoral Fellow at Army Research Laboratory (ARL).
Samuel Goldstein: Ph.D. student (2020-2022). Next position: Data scientist at World Wide Technology.
Farshad Rafiei: Ph.D. student (2016-2022). Next position: Machine learning scientist at IQVIA.
Medha Shekhar: Ph.D. student (2016-2021). Next position: Postdoc at University College London.
Jiwon Yeon: Ph.D. student (2016-2021). Next position: Postdoc at Stanford University.
Ji Won Bang: Postdoc (2015-2017). Next position: Postdoc at New York University.