Toby Wise

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Toby Wise

Toby Wise

@toby_wise

@wellcometrust fellow @KingsIoPPN working on computational psychiatry of mood & anxiety

London Katılım Ocak 2009
958 Takip Edilen1.6K Takipçiler
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Dr Talar Moukhtarian
Dr Talar Moukhtarian@TMoukhtarian·
🚨Calling early to mid-career women in academia We’re conducting research @warwickmed to explore the challenges faced by women in academia. Your insights will help us shape strategies to support career progression and retention. Survey password is 4321 warwick.co1.qualtrics.com/jfe/form/SV_54…
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Isaac Fradkin
Isaac Fradkin@FradkinIsaac·
I’m excited to share our new, open-access paper published today in @NatMentHealth, “Latent mechanisms of language disorganization relate to specific dimensions of psychopathology”. nature.com/articles/s4422…
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Leah Banellis
Leah Banellis@LeahBanellis·
What happens when our stream of consciousness turns inward, towards the body? Our new fMRI study of 536 individuals finds that 'body-wandering' is associated with distinct patterns of brain connectivity, physiology, affect, and mental health: biorxiv.org/content/10.110…
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nitzan shahar
nitzan shahar@shaharnitzan·
@paul_b_sharp Interesting. Maybe a more preliminary question would be whether humans engage in latent counterfactual updating for states they could have visited but chose not to. We know this happens for actions, but Im not sure if anyone ever tried to show that at the level of states ..
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Paul Sharp
Paul Sharp@paul_b_sharp·
The 2-step task could be solved by using a cog map to assign credit to non-taken action post rare transition. This differs from using a cog map to plan action values at decision time. Does existing work test which is used, & do we think the former is an instance of planning?
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Paul Sharp
Paul Sharp@paul_b_sharp·
Thanks Marcelo! It's been great to see groups like yours demonstrate how NNs find clever / cheaper strategies relative to assumed model-based solutions. Along these lines, I developed a delayed planning task, where subjects can choose to engage control via selecting an action (where initial engagement of control presumably reflects planning formation) versus relinquish control (if they correctly infer actions at that stage have equivalent value) and it took us years to realize identical-valued strategies to the assumed model-based ones that are computationally cheaper. Makes me think we should use NNs for model discovery on our tasks during piloting more often!
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Kelly Donegan
Kelly Donegan@DoneganKelly·
Null findings are important ‼️ Excited to share my latest work finding model-based planning does NOT improve following ketamine 💉, antidepressant 💊 or iCBT 🧑‍💻 treatments, 🧵👇 🔗 osf.io/preprints/psya…
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Toby Wise
Toby Wise@toby_wise·
In this preprint we refine the method and describe it in detail. Essentially, we train Lasso-regularised regression models to predict sum scores from individual items. The result is a short scale with a set of weights to optimally predict true sum scores. 3/n
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Toby Wise
Toby Wise@toby_wise·
🌟New preprint! 🌟 We describe a method for generating short versions of questionnaire measures using (very simple) machine learning (w/ @NuraSidarus) osf.io/vwmkd 1/n
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Peter Hitchcock
Peter Hitchcock@PF_Hitchcock·
Just out! 🗞️ * How RL and WM interact when actions can lead to reward or to punishment * A striking lack of learning and retention diffs as a function of depr/anxiety and rumin symptoms * An RL but not S-R module captured retention patterns psyarxiv.com/82pyz
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Toby Wise
Toby Wise@toby_wise·
@DoneganKelly Thanks Kelly! It was of course very much inspired by your brilliant work!
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Kelly Donegan
Kelly Donegan@DoneganKelly·
Didn’t think the two-step task could get much better… but it has 👏🏼 Super interesting to see my work replicated & extended! Nice demo of how📱& modelling can help our mechanistic framework of compulsivity 🆒🆒🆒 @toby_wise
Toby Wise@toby_wise

📰 New preprint! We show using computational modelling that transdiagnostic compulsivity is associated with greater uncertainty about learned task structure This work was led by Siri Sookud, starting during her MSc Thread below👇 osf.io/preprints/psya… 1/n

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