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SUMMARY:Metacognitive control of reinforcement learning and causal inferen
 ce - Sang Wan Lee\, Korea Advanced Institute of Science and Technology (KA
 IST)
DTSTART:20160622T131500Z
DTEND:20160622T141500Z
UID:TALK66520@talks.cam.ac.uk
CONTACT:Paula Kaanders
DESCRIPTION:A central goal of both artificial intelligence and neuroscienc
 e is to understand human cognitive processes that are flexible enough to p
 erform a wide range of tasks. In this regard\, it is becoming widely recog
 nized that having several different learning and decision systems may be t
 he optimal design for the human brain that operates under constraints on p
 erformance\, time\, and energy. Over the past decade special attention has
  been given to advancing our understanding of how the brain employs multip
 le separable systems to learn about the world and how they ultimately come
  to drive coherent behaviour.\n\nBased upon a combination of functional ma
 gnetic resonance imaging (fMRI) and computational modeling\, I will discus
 s a theoretical account of how the human lateral prefrontal cortex (LPFC) 
 influences the brain's various learning systems\, placing the LPFC as the 
 brain's “meta-controller”. I will present evidence suggesting that the
  inferior lateral PFC allocate control to learning systems associated with
  either goal-directed (model-based)\, or habitual (model-free) learning. I
  will also show evidence supporting the view that the ventrolateral PFC pl
 ays a crucial role in switching between incremental and one-shot causal le
 arning. Finally\, I will describe recent experiments using a non-invasive 
 brain stimulation technique aimed at developing a deeper appreciation of t
 he LPFC's role in metacognitive control. These findings may help to explai
 n how and why control processes breakdown in various psychiatric disorders
 \, including obsessive-compulsive disorders and addiction. In turn\, a dee
 per insight into these mechanistic anomalies may permit further developmen
 t of algorithms for restoring stability to prefrontal systems.
LOCATION:Kenneth Craik Room\, Craik Marshall Building\, Downing Site\, Cam
 bridge
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