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Michael Shadlen is a professor of neuroscience in the Department of Neuroscience at Columbia University, where he's the principle investigator of the Shadlen Lab. If you study the neural basis of decision making, you already know Shadlen's extensive research, because you are constantly referring to it if you're not already in his lab doing the work. The name Shadlen adorns many many papers relating the behavior and neural activity during decision-making to mathematical models in the drift diffusion family of models. That's not the only work he is known for,



As you may have gleaned from those little intro clips, Michael is with me today to discuss his account of what makes a thought conscious, in the hopes to inspire neuroscience research to eventually tackle the hard problem of consciousness - why and how we have subjective experience.



But Mike's account isn't an account of just consciousness. It's an account of nonconscious thought and conscious thought, and how thoughts go from non-conscious to conscious



His account is inspired by multiple sources and lines of reasoning.



Partly, Shadlen refers to philosophical accounts of cognition by people like Marleau-Ponty and James Gibson, appreciating the embodied and ecological aspects of cognition.



And much of his account derives from his own decades of research studying the neural basis of decision-making mostly using perceptual choice tasks where animals make eye movements to report their decisions.



So we discuss some of that, including what we continue to learn about neurobiological, neurophysiological, and anatomical details of brains, and the possibility of AI consciousness, given Shadlen's account.



<ul class="wp-block-list">
<li><a href="https://shadlenlab.zi.columbia.edu/">Shadlen Lab</a>.</li>



<li>Twitter: <a href="https://x.com/shadlen">@shadlen</a>.</li>



<li>Paper: to be added soon…</li>



<li><a href="https://www.youtube.com/watch?v=vvvqyUf0BQc">Decision Making as a Model of thought</a></li>
</ul>



0:00 - Intro
7:05 - Overview of Mike's account
9:10 - Thought as interrogation
21:03 - Neurons and thoughts
27:05 - Why so many neurons?
36:21 - Evolution of Mike's thinking
39:48 - Marleau-Ponty, cognition, and meaning
44:54 - Naturalistic tasks
51:11 - Consciousness
58:01 - Martin Buber and relational consciousness
1:00:18 - Social and conscious phenomena correlated
1:04:17 - Function vs. nature of consciousness
1:06:05 - Did language evolve because of consciousness?
1:11:11 - Weak phenomenology and long-range feedback
1:22:02 - How does interrogation work in the brain?
1:26:18 - AI consciousness
1:35:49 - The hard problem of consciousness
1:39:34 - Meditation and flow

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