May 28, 2021 – Drew Linsley

Uncovering the circuit mechanisms that shape contextual phenomena  Neurons in visual cortex are sensitive to context. Neural responses to stimuli presented within their classical receptive fields (CRFs) are modulated by the presence of other stimuli – in their CRF and their surrounding extra-classical receptive field (eCRF). While CRF and eCRF phenomena have been extensively studied […]

May 7, 2021 – Kohitij Kar

Towards a neurally mechanistic understanding of visual cognition I am interested in developing a neurally mechanistic understanding of how primate brains represent the world through its visual system and how such representations enable a remarkable set of intelligent behaviors. In this talk, I will primarily highlight aspects of my current research that focuses on dissecting […]

April 23, 2021 – Patrick Bissett

Severe issues and solutions for the response inhibition data from the ABCD study and beyond   The stop-signal paradigm, a primary paradigm for measuring response inhibition, rests on the theoretical foundations of race models, which assumes independence between the overt go process and the inhibitory stop process. We show severe violations of independence across various […]

March 19, 2021 – Akshay Jagadeesh

Texture-like representations support object perception in dCNNs and the human brain.  Humans identify objects by the presence of complex visual features arranged in particular configurations. How does the visual system represent objects? In one widely held account (“holistic object” hypothesis), the ventral temporal cortex (VTC) explicitly represents objects as a whole, such that it is […]

March 12, 2021 – Faculty Lightning Talks

For the 2021 Admissions Weekend, FriSem will be hosting a panel of faculty speakers to present their ongoing research. Mike Frank: Towards predictive models of early language learningTobi Gerstenberg: Understanding “why”: The role of causality in cognitionNoah Goodman: Research in the Goodman LabKalanit Grill-Spector: Neural investigations of high-level vision in the Vision and Perception Neuroscience […]

March 5, 2021 – Tyler Bonnen

When the ventral visual stream is not enough: A deep learning account of medial temporal lobe involvement in perception Animals seamlessly integrate sensory activity with previously encountered, behaviorally relevant experience. Neuroanatomical structures within the medial temporal lobe, such as perirhinal cortex (PRC), are known to enable these memory-related behaviors. Yet there is an enduring debate […]

February 26, 2021 – Dan Yamins

Four Not-So-Easy Pieces:  Improving Neural Network Models of the Visual System Convolutional Neural Networks (CNNs) optimized for invariant category recognition have turned out to be OK, if imperfect, models of neural responses in the ventral visual pathway of humans and non-human primates.  However, these very imperfections are the touchstones for a series of deep unsolved questions […]

February 19, 2021 – Russ Poldrack

Toward a culture of computational reproducibility: Values, principles, and practices Ensuring that the results of data analysis are both valid and reproducible is a fundamental responsibility of every computational scientist, but both are increasingly difficult in the context of complex analysis workflows and big data.  Building off of ideas from software engineering, I will argue that we need to […]

November 6, 2020 – Insub Kim

Spatiotemporal population receptive field model in human visual cortex  Visual scenes we experience contain objects that move over positions and time. To interpret dynamic changes in the visual scene, our visual system requires representations of both space and time. However, previous population receptive field (pRF) models focused on the spatial domain of the stimulus. Here, […]

October 30, 2020 – Emily Kubota

The white matter connectivity of the ventral stream in childhood Ventral temporal cortex consists of category selective regions that fall in consistent anatomical locations across individuals and over development. This consistency has many to wonder about the organizing principle(s) of the ventral stream. While there have been functional hypotheses (foveal/peripheral bias, real-world size and curvature), […]