I got tenure today. I am immensely grateful to everyone I have been lucky enough to be mentored by, collaborate with and learn from. Thank you to those who wrote letters for me. And a special thank you to lab members, old and new - this is a reflection on all of us, not just me.
Remembering Charles Darwin
#OnThisDay
, as he died today in 1882. "There is grandeur in this view of life...from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved."
Functions in the brain are BOTH specialized AND distributed - the combinatorial explosion that affords is at the root of our innovative abilities. See here for example:
In a first for us both,
@tompollak
and I just had a paper accepted first time round without revisions :-) We try to explain the puzzling observation that there are no congenitally blind people with schizophrenia. Looking forward to sharing soon.
New paper with
@tompollak
- we think together about why there are vanishingly few (if any) congenitally blind people with schizophrenia - the primacy of vision in organizing our world model and psychosis
Here is our comprehensive meta-analysis of human prediction errors (PE) for incentives, perception, cognition, and actions: a wonderful collaboration with
@jmollick_neuro
@hedykober
and a return to human prediction error signals - my first love
Excited to share new work from
@jmollick_neuro
,
@hedykober
, and myself:
The largest meta-analysis of human prediction error signals encompassing reward tasks, punishments, perceptual tasks, and cognitive tasks...
Really cool case: a person with schizophrenia whose hallucinations and delusions largely RESOLVED after a right frontal stroke: Consistent with our observation of hyperengagement of rDLPFC prediction error and delusions
@CogNPsychiatry
FTW
Some thoughts from
@ManojDoss
@FredBarrettPhD
and I on the recent psilocybin and depression paper. We feel the data don’t warrant the conclusions, and certainly not the bloviating in the media
I'm hiring a post-doc for a 4 year position on an imaging and computational psychiatry project examining the psychosis continuum - psychics, patients, targeted individuals. Hoping to understand hallucinations and delusions, brain and mind Please DM if you are interested and/or RT
Our Templeton grant on religious experiences and cognition was funded :-)
If you are interested in a multidisciplinary qual/quant post doc with Brian Scholl,
@tanyaluhrmann
, Dean Zimmerman, Ann Taves, me, and many others, please reach out
Weird misperception of a person perched on their laptop. Immediately thought this was some cool zoom background function - instead of an in person talk on a stage. Pandemic has changed my priors
First paper of 2024, and first official foray into philosophy with
@fedebng
- we try to address some critiques of the predictive coding account of delusions - like 'why believe anything at all?' and 'where do these ideas come from?'
First official day as an Associate Professor. A long and sometimes unpleasant process. Thank you to my local and arms length letter writers, and to all lab members, colleagues and friends!
My h-index may be puny, I am not a member of any Royal Colleges, but cross me and know, you are crossing the guy with the cheekiest smile in North West England in 1985. Therefore, any detraction would be a cheap shot
Latest paper with
@jamesmgold
, led by
@S0niaBansal
- people with psychosis are impaired at detecting changes in motion direction, weighting initial percept more strongly. This overweighting correlates with positive symptoms, and replicates across sites
New from me, a primer on Computational Psychiatry and its application to psychosis, with a focus cross-species translation - from bench to bedside, and back
The dopamine reward prediction error story further refined by
@DeepMindAI
in
@nature
- its a distributional code, rather than a mean reward value, which they claim allows multiple possible outcomes to be captured in the signal
I find myself increasingly fascinated by academic disagreements, their social and scientific consequences. I wonder about the reviewers at Molecular Psychiatry, having learned a little more about those at Nature Medicine in the course of my disagreement…
And, it appears to have happened again, same dataset, same author, 4 years later, no interaction tested/reported, and differences in baseline between the two treatments
@shayla__love
🍄 Psilocybin & escitalopram create different reconfigurations in the global functional hierarchy of 🧠 brain dynamics in people with major depressive disorder 👇
@HedoniaResearch
@RCarhartHarris
@ysanz6
Delighted to have played a small role in this:
ML models applied to clinical trials do not generalize well to new trials (even of similar drugs). Fabulous work spearheaded by
@itschekkers
Karl Jaspers in General Psychopathology: biological and psychological investigations of the mind are like “the exploration of an unknown continent from opposite directions, where the explorers never meet because of the impenetrable country that intervenes"
I am often asked why I left meditation/mindfulness research after my PhD. The simple answer is that I wanted to persue basic research in computational neuroscience and perception science. The longer answer...
2009 moved to US. Excited and precocious. Enjoyed it and was lucky to stay. Struggled to get funding. Got angry & unhealthy. Almost left academia. Ran. Got healthier. Became a Dad. Persisted. Started dream work with the team I longed for. 2020: still excited
Notice of Award for my first R01 arrived. Bless up! Thankful to Jim Gold and his team incl
@hernaus_tweets
and special shout out to to
@AlPowers7
for collaboration and cameraderie. More work on predictive coding, delusions, hallucinations and psychics to come from us :-)
Suddenly accruing followers from the psychedelics and breath work communities - Hi 🙋🏻♂️- I am not the enemy, I promise. Very interested in psychedelics’ potential. Want to make sure it is realized convincingly.
New from
@joan_ongchoco
@santiagocdeo
and me: We show that thinking that random events have relevance and importance is associated with aberrant associative learning, rather than reasoning processes
New preprint from the lab -
@PLeptourgos
replicates and extends our conditioned hallucinations work - people who hallucinate show more conditioned hallucinations, more prior overweighting, related to LOWER glutamate levels in the insula
I really don’t want to become THAT guy, but these are self-reported drinking days following an unblinded intervention (they guessed correctly they got the drug). It’s still promising and interesting.
The rush of dopamine when, after 21 years of trying, I finally successfully merge two documents in word retaining the comments of various contributing authors. It’s the little things
Some thoughts from
@Kurt_Fraser
and I on the aberrant salience account of psychosis, what we now know about dopamine, its dysfunction in, and its role in behavior. The original paper was beautiful, but the story must now move beyond incentive salience
New in
@iScience_CP
- spearheaded by the inimitable
@joan_ongchoco
with modeling by
@santiagocdeo
- Kamin blocking reveals excessive teleological thinking is driven by aberrant associations (and prediction errors) NOT failures of reasoning:
My new favorite paper: Bravo
@hugospiers
and team. Your (n=400,000) real-world developmental experience of the environment colors how you process new online environments 🔥🔥🔥
Amsterdam is very very nice. Europe is very very nice. I am glad to be home with family and COVID free, but the differences in lifestyle and apparent quality were stark. More bikes than cars makes a huge difference - imagine a quiet, clean, rush hour
New paper with
@AlPowers7
in World Psychiatry - unpacking some of the roots of conditioned hallucinations: dating back to Carl Seashore in 1895 at Yale and Jerzy Konorsk who wrote of a 'perceptual hunger' which we suggest relates to strong priors:
More conditioned hallucinations in people at clinical high risk for psychosis, + effect correlates with detection of speech in sine wave stimuli
@AlPowers7
@GregStrauss8
@EllmanLauren
@jamesmgold
Vijay Mittal and team - a first from our CAPR project 🎉
New preprint from the lab: Paranoia and belief updating during a crisis. It’s what we’ve been focusing on before, during, and after the lockdown. Led by
@ErinJFeeney
and
@PraveenS_
who’ve worked tirelessly. Thread👇
New from
@HTMcGovern1
@PLeptourgos
Brendan Hutchinson and myself:
Do Psychedelics Change Beliefs?
They might, but not universally - some things changes, others don't.
More fundamentally, we must consider baseline expectations and collider bias