Peter Murphy
@neuromurphy
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Cognitive neuroscientist | Assistant Professor @MUpsychdept @MaynoothUni
Dublin, Ireland
Joined January 2020
RT @elisabethpares: Very happy to share this paper, now published in @NatureComms! With Simon Kelly and @neuromurph….
nature.com
Nature Communications - People are capable of making near-optimal decisions in volatile, changing environments. Here, the authors show how two neural decision signals encode distinct aspects of the...
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RT @yfvisser: Starting as a postdoc with @KobeDesender at @KU_Leuven today, excited to look further into metacognition & decision making wi….
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RT @MeadhbhBrosnan: Two days left to apply for this PhD opportunity in cognitive neuroscience @ucddublin 🧠👇🏻👇🏻👇🏻.
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We think that this finding might hint at a flexible neural architecture for decision-making that is adapted across different task contexts. Check out the paper for the details! (7/7)
biorxiv.org
Making accurate decisions in noisy or otherwise uncertain environments requires integrating evidence over time. Using simple tasks requiring rapid evaluation of a stationary sensory feature, two...
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This role for the centro-parietal positivity (CPP) in expanded judgements seems to be quite different from its well-characterised reflection of the evidence accumulation process itself on more continuous/stationary integration tasks. (6/7).
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. the absolute change in the decision variable that the sample brought about (its ‘effective evidence’), which our task dissociates from other interesting variables (the ‘objective’ evidence it carried, and how surprising it was). (5/7).
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The centro-parietal signal, by contrast, transiently encoded only local information carried by a sensory sample: specifically. (4/7).
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Consistent with our previous MEG work (, we found that the motor preparation signal (motor beta lateralisation) encoded a building decision variable consistent with a normative, non-linear approach to accumulating evidence on this task. (3/7).
How do we make perceptual decisions when the state of the world can change unpredictably over time? Find out in our new paper, out today in @NatureNeuro! 1/5.
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The task involves accumulation of discrete sensory evidence samples over long (multi-second) trials and includes volatility in the evidence source – all useful features for distinguishing different decision-related quantities and identifying their neural correlates. (2/7).
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Latest work, led by the exceptional @elisabethpares! We discovered an intriguing functional dissociation between motor preparatory and centro-parietal EEG decision signals on an ‘expanded judgment’ task. (1/7).
Today I'm very happy to share our recent work, with @spk3lly and @neuromurphy!.We show that centroparietal EEG signals track momentary belief updates rather than an integrated decision variable across samples in a discrete token, volatile environment task.
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RT @colizoli: 📢I am hiring a PhD candidate! Are you passionate about unraveling the mysteries of consciousness? And do you want to delve in….
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RT @Deirdre_AR: Calling all students in psychology, economics and related disciplines. Come work with us in the Behavioural Research Unit (….
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RT @KobeDesender: PhD and Post-Doc positions in my Lab!.We are currently recruiting (i) a Marie-Curie "CODE" PhD student to work on confide….
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RT @NeuroscienceIRL: PhD opportunity in Neuropsychology at Queen's University Belfast! . More information and to apply: .
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RT @MUpsychdept: Dr. Sadhbh Byrne is seeking Expressions of Interest from 18-25 yr olds to join an Advisory Group for the PRISM research pr….
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Thread describing our findings and why we think they're interesting:
Check out our latest work, linking belief updating and phasic arousal to individual differences in psychosis proneness, now up on @biorxivpreprint! 1/12.
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New work, linking belief updating and phasic arousal to individual differences in psychosis proneness, now up on @biorxivpreprint!
biorxiv.org
Many decisions entail the updating of beliefs about the state of the environment, a process that may go awry in psychosis. When environments are subject to hidden changes in their state, optimal...
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RT @seanfw: Comp. Neuro./AI Faculty job alert!!! Bristol is awesome for neuroscience and AI, and a fantastic, supportive place to start a l….
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RT @elisabethpares: Excited to be at #SfN23 #SfN2023! I'll be presenting a poster on the EEG correlates of normative belief updates on Mond….
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RT @LHuntNeuro: While it’s *deeply* unfashionable to be publishing in @eLife right now - do humour us for advertising a study that was seve….
elifesciences.org
Human behaviour in a continuous decision making task adapts to the overall statistics of the sensory environment, and these adaptations are also reflected in changes in neural responses to incoming...
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