Evidence map›Paper›PMID 34384664›Full record

ArticleSchizophrenia research2022

Everything is connected: Inference and attractors in delusions.

Rick A Adams, Peter Vincent, David Benrimoh, Karl J Friston, Thomas Parr

Abstract read
In one paragraph

Article in Schizophrenia research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Review
  4. The role of affective states in computational psychiatry.The international journal of neuropsychopharmacology · 2025
    Review
  5. Article
  6. Transcultural psychiatry · 2024
    Article
  7. Review
  8. The Many Roles of Precision in Action.Entropy (Basel, Switzerland) · 2024
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Resolving the Delusion Paradox.Schizophrenia bulletin · 2023
    Review
  17. Article
  18. Article
  19. Review
  20. Flexible intentions: An Active Inference theory.Frontiers in computational neuroscience · 2023
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Rick A AdamsCentre for Medical Image Computing, Dept of Computer Science, University College London, 90 High Holborn, London WC1V 6LJ, UK; Max Planck Centre for Computational Psychiatry and Ageing Research, University College London, Russell Square House, 10-12 Russell Square, London WC1B 5EH, UK. Electronic address: rick.adams@ucl.ac.uk.
Peter VincentSainsbury Wellcome Centre, University College London, 25 Howland St, London W1T 4JG, UK.
David BenrimohDepartment of Psychiatry, McGill University, H3G 1A4 QC, Canada.
Karl J FristonWellcome Centre for Human Neuroimaging, University College London, 12 Queen Square, London WC1N 3AR, UK.
Thomas ParrWellcome Centre for Human Neuroimaging, University College London, 12 Queen Square, London WC1N 3AR, UK.

Funding

Department of HealthMedical Research Council MR/S007806/1Wellcome TrustWellcome Trust 088130/Z/09/ZWellcome Trust 090843/F/09/Z
6 · The paper itself

Abstract

Delusions are, by popular definition, false beliefs that are held with certainty and resistant to contradictory evidence. They seem at odds with the notion that the brain at least approximates Bayesian inference. This is especially the case in schizophrenia, a disorder thought to relate to decreased - rather than increased - certainty in the brain's model of the world. We use an active inference Markov decision process model (a Bayes-optimal decision-making agent) to perform a simple task involving social and non-social inferences. We show that even moderate changes in some model parameters - decreasing confidence in sensory input and increasing confidence in states implied by its own (especially habitual) actions - can lead to delusions as defined above. Incorporating affect in the model increases delusions, specifically in the social domain. The model also reproduces some classic psychological effects, including choice-induced preference change, and an optimism bias in inferences about oneself. A key observation is that no change in a single parameter is both necessary and sufficient for delusions; rather, delusions arise due to conditional dependencies that create 'basins of attraction' which trap Bayesian beliefs. Simulating the effects of antidopaminergic antipsychotics - by reducing the model's confidence in its actions - demonstrates that the model can escape from these attractors, through this synthetic pharmacotherapy.

Indexed as

Antipsychotic AgentsSchizophreniaBayes TheoremBiasDelusionsHumansAntipsychotic AgentsActive inferenceBayesianChoice-induced preference changeComputational psychiatryDelusionsParanoia

Identifiers

PMID34384664
PMCPMC9241990

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.