Dan Bang has contributed to an excellent episode of the Anthill podcast on confidence hosted by The Conversation. Among other things he discusses our recent results on the role of medial PFC in the construction of confidence.
Last weekend we pitched up at Latitude Festival as part of the BrainHub, organized together with James Kilner's group. We used this as an opportunity to get some user feedback about the latest prototype version of "MetacogMission" - an app that Andy McWilliams is developing together with London-based technology company DamnFine to study metacognition via a series of decision-making games. Thanks for everyone who took part - we got tons of useful feedback and pilot data that we are now starting to sift through.
Here's a brilliant timelapse video of the BrainHub put together by Alex Galvez-Pol in James' lab. We are also very grateful to WCHN Public Engagement coordinator Cassie Hughill who held everything together and kept everyone fed and watered, and to Ben from DamnFine for being on hand for remote tech support all the way from New York! And last but not least, Max, Matan, Xiao and Alisa who worked hard to make it a great event.
Dan Bang's paper isolating decision confidence from its component parts has recently been published in PNAS - congratulations Dan! An open access preprint can be found here, and code/data supporting the study are on our lab GitHub site.
In this paper we devised a novel psychophysical task that allowed us to independently manipulate the certainty about the perceptual input (the direction of a cloud of moving dots) and the difficulty of the decision (how close the dots were to a reference line). Both factors influenced confidence. Using fMRI, we found that some brain regions previously implicated in the encoding of decision confidence actually tracked either perceptual certainty (such as the parietal cortex) or decision difficulty (such as pre-SMA), whereas confidence was uniquely tracked in medial PFC (see image below). This may explain why prefrontal damage is regularly associated with dysfunction in metacognition (higher-level estimates of task performance), without affecting "lower level" encoding of beliefs.
This week the MetaLab teamed up with Benedetto De Martino's BdMLab for a joint retreat at the Royal Society. We were glad to have Chris Frith, Nick Shea and Howard Bowman join us as guests of honour. There were plenty of half-baked ideas (from PI's), some more fully-baked data blitzes and a surprise exchanges of books, before tapas and wine at Terroir.
Our paper "Neural mediators of changes of mind about perceptual decisions" is now out in Nature Neuroscience. This study was carried out by Steve while he was a postdoc at NYU in collaboration with Nathaniel Daw and Illy van der Putten, and used manipulations of post-decision evidence to identify differential contributions of subregions of the prefrontal cortex during changes of mind. Redmond O'Connell and Peter Murphy wrote a nice commentary on the study (from which the image below is taken from) in the same issue which can be accessed here.
Over the weekend members of the MetaLab descended on the Tate Modern to take part in the fantastic Self-Impressions event organized by the Institute of Philosophy. We used this as an opportunity to get some user feedback of a prototype of "MetacogMission" - an app we're developing together with London-based technology company DamnFine to quantify metacognition via a series of decision-making games. Thanks for everyone who came along, we got tons of useful feedback that we are now busily implementing!
Here are some photos of the day. We are very grateful to WCHN Public Engagement coordinator Cassie, to DamnFine gurus Tristam and George, and Andy McWilliams who is leading the development of MetacogMission. And of course all the lab who pitched in to help make it a great event - thank you to all!
A paper entitled "Psychiatric symptom dimensions are associated with dissociable shifts in metacognition but not task performance" has been accepted in Biological Psychiatry. Congratulations to Tricia and Marion!
Steven Chau and Shaima Alsuwaidi, last year's MetaLab MSc students, have both achieved distinction awards for their neuroscience MSc projects. Congratulations to both of them!
Steve has been awarded a Sir Henry Dale Fellowship from the Wellcome Trust and Royal Society, to start in June 2018. The award will fund research to study the cognitive and neural structure of self-beliefs, and how these beliefs can be modified over time.
Jason is leaving the lab to start a Masters in Computer Science at UCSF after two years of working in the group as an RA. We wish him all the best with his studies!
Several of the lab will be presenting our latest stuff at SFN in Washington D.C. Congratulations to Dan Bang whose abstract was selected for a nanosynmposium presentation!
We have published a paper in Neuroscience of Consciousness on our new toolbox for estimating metacognitive efficiency (how well confidence ratings track performance) using hierarchical Bayes. The toolbox is available for download here. The main result is that we can obtain robust estimates of meta-d' with small numbers of trials, which may be useful for future studies in clinical settings.
A new paper in collaboration with NYU colleagues Elyse Norton, Nathaniel Daw and Mike Landy, "Suboptimal criterion learning in static and dynamic environments" has been published in PLoS Computational Biology
Max Rollwage has joined the MetaLab as a PhD student (co-supervised with Ray Dolan). Max is part of the new 4-year PhD programme in Computational Psychiatry at UCL. We also welcome new Masters students - Steven Chau and Shaima Alsuwaidi.