@GorisLab

Twitter account of the Goris lab at UT Austin (run by lab members)

 Austin, Texas
Joined March 2020
  • Tweets49
  • Following95
  • Followers197
4Media
At #SfN24? Come check out my poster F3 on how population activity in V1 informs perception decision and confidence
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Simulations of bounded drift diffusion showed that these observations were consistent with a prior-induced offset and drift rate, revealing a mechanism by which prefrontal circuits can implement Bayesian-like inference.
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These findings are consistent with an approximate hierarchical inference process as proposed by Lange et al. (2021) @wrongu from @haefnerlab in which initial prior beliefs become entrenched through confirmation bias.
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Huge thanks to our PI Robbe Goris and the members of the Goris lab who supported this work, @CMZiemba @zoebsinger @yoon_bai Quiana Jeffs and @9Gaby_Reyes
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We found that prior expectations impact the DV′s trajectory both before *and* during stimulus presentation such that DV trajectories with a smaller dynamic range result in more biased and less sensitive perceptual decisions.
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New preprint from @ThomasALanglois and @julie_charlton_ ! tinyurl.com/kfckzx8j We asked how prior expectations are combined with sensory signals to form a perceptual decision in macaque PFC.
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Importantly, we leveraged a task design that produced a bias in monkeys’ perceptual judgements, but not their motor reports. This allowed us to isolate the perceptual component of the decision variable.
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Happy to share a new preprint by the brilliant and indefatigable @MiguelVivarLazo. The first of several stories we want to tell with this rich dataset, which features joint measurements of choice, reaction time, and confidence along with ensemble recordings from LIP...
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New from the lab, work by @zoebsinger and @CMZiemba. Here we investigated how population activity in early sensory cortex informs perceptual choices as well as perceptual confidence. biorxiv.org/content/10.1101/…

Sensory population activity reveals confidence computations in the primate visual system

Perception is fallible[1][1]–[3][2]. Humans know this[4][3]–[6][4], and so do some non-human animals like macaque monkeys[7][5]–[14][6]. When monkeys report more confidence in a perceptual decision,...

biorxiv.org
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This paradigm holds great utility for addressing questions far beyond those we tackled.
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Check out the exciting work of @MiguelVivarLazo and @chris_fetsch who examine the temporal evolution of choice and confidence signals in LIP using a similar explicit confidence reporting task biorxiv.org/content/10.1101/…

Neural basis of concurrent deliberation toward a choice and degree of confidence

Decision confidence plays a key role in flexible behavior, but exactly how and when it arises in the brain remains unclear. Theoretical accounts suggest that confidence can be inferred from the same...

biorxiv.org
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Hot off the Press: "Abstract deliberation by visuomotorneurons in prefrontal cortex" - Julie A. Charlton & Robbe L. T. Goris has been published in Nature Neuroscience rdcu.be/dF7Kl @julie_charlton_ @NatureNeuro
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At #Cosyne2024 ? Check out @julie_charlton_ 's poster tomorrow!
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Response sub-additivity and variability quenching in visual cortex — a Perspective by Robbe L. T. Goris, Ruben Coen-Cagli, Kenneth D. Miller, Nicholas J. Priebe & Máté Lengyel go.nature.com/49qufI3 @GorisLab @CoenCagli_Lab @kendmil @lengyel_m
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Sub-additivity (aka. response normalization) and variability quenching often go hand-in-hand in cortex. Why? We provide some potential answers: rdcu.be/dy1q5 -- a review with @GorisLab @CoenCagli_Lab @kendmil and Nick Priebe.
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The Goris lab has two posters at #SfN23 . Tomorrow morning come learn about metacognitive learning. At Tuesday's afternoon session learn about how neural population dynamics predict the use of prior information in perceptual decision making.
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This afternoon, Ruben Coen-Cagli and Robbe Goris are co-hosing a mini-symposium: Suppression and Variability in Visual Cortex highlighting theoretical and empirical work which is revealing the link between these two concepts. Come checkout our great line-up of speakers! #SfN23
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At #SfN23? This afternoon I'm excited to share our work on the representation of uncertainty in visual cortex in the minisymposium on suppression and variability in visual cortex.
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New out from the lab, a project headed by former graduate student Dr. @julie_charlton_ :
Julie Charlton@julie_charlton_8 Jun 2023
#PLOSCompBio: Environmental dynamics shape perceptual decision bias dx.plos.org/10.1371/journal.… Now published!
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