{"692400":{"#nid":"692400","#data":{"type":"event","title":"PhD Defense by Kai Xue","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EName:\u0026nbsp;Kai Xue\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ESchool of Psychological and Brain Sciences \u2013 Ph.D. Dissertation Defense Meeting\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EDate: Tue, Nov 10th, 2026\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ETime\u003C\/strong\u003E: 10:00 AM - 11:00 AM EST\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ELocation\u003C\/strong\u003E: \u003Ca href=\u0022https:\/\/nam12.safelinks.protection.outlook.com\/?url=https%3A%2F%2Fgatech.zoom.us%2Fmy%2Fkaixue\u0026amp;data=05%7C02%7Cannouncements%40grad.gatech.edu%7Cdae4346e5cb443cc2d8508df0db2b0bd%7C482198bbae7b4b258b7a6d7f32faa083%7C1%7C0%7C639244733467475940%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C\u0026amp;sdata=J8ClO%2BWinSOlSNoB%2FKx6R%2FjeM%2Bg5yyyXCoOhmylbZqg%3D\u0026amp;reserved=0\u0022 title=\u0022Original URL: https:\/\/gatech.zoom.us\/my\/kaixue. Click or tap if you trust this link.\u0022\u003Ehttps:\/\/gatech.zoom.us\/my\/kaixue\u003C\/a\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EDissertation Committee Chair\/Advisor:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003EDobromir Rahnev, Ph.D. (Georgia Tech)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EDissertation Committee Members:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003ETansu Celikel, Ph.D. (Georgia Tech)\u003C\/p\u003E\u003Cp\u003ESashank Varma, Ph.D. (Georgia Tech)\u003C\/p\u003E\u003Cp\u003EMengyao Li, Ph.D. (Georgia Tech)\u003C\/p\u003E\u003Cp\u003EMegan Peters, Ph.D. (University College London)\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003ETitle: The Computation\u0026nbsp;of Confidence in Perceptual Decision-Making\u0026nbsp;\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EAbstract:\u0026nbsp;\u003C\/strong\u003EThis dissertation investigates the computational mechanisms underlying confidence in perceptual decision-making through three\u0026nbsp;related\u0026nbsp;studies. Study 1 uses transcranial magnetic stimulation (TMS) to\u0026nbsp;establish\u0026nbsp;when confidence is computed, revealing that the dorsolateral prefrontal cortex (DLPFC) contributes to confidence during a broad temporal window overlapping with decision-making. Study 2 tests competing computational theories\u0026nbsp;\u2014\u0026nbsp;Bayesian Confidence Hypothesis (BCH) versus Confidence in Raw Evidence Space (CRES)\u0026nbsp;\u2014\u0026nbsp;in two-choice tasks, finding consistent support for evidence-based rather than probability-based confidence computation. Study 3 extends this investigation to multi-alternative decisions using a novel dot numerosity paradigm,\u0026nbsp;demonstrating\u0026nbsp;that confidence tracks the difference between the two highest evidence values rather than choice probability. Together, these studies advance a mechanistic framework in which confidence\u0026nbsp;emerges\u0026nbsp;in parallel with decisions and\u0026nbsp;operates\u0026nbsp;on sensory evidence rather than probability estimates.\u0026nbsp;\u003C\/p\u003E\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe Computation of Confidence in Perceptual Decision-Making\u0026nbsp;\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"The Computation of Confidence in Perceptual Decision-Making "}],"uid":"27707","created_gmt":"2026-09-08 15:26:09","changed_gmt":"2026-09-08 15:26:48","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2026-11-10T10:00:00-05:00","event_time_end":"2026-11-10T23:00:00-05:00","event_time_end_last":"2026-11-10T23:00:00-05:00","gmt_time_start":"2026-11-10 15:00:00","gmt_time_end":"2026-11-11 04:00:00","gmt_time_end_last":"2026-11-11 04:00:00","rrule":null,"timezone":"America\/New_York"},"location":"ZOOM","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"100811","name":"Phd Defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}