Evidence map›Paper›PMID 28495493›Full record

ArticleSchizophrenia research2018

The value of novelty in schizophrenia.

Cristina Martinelli, Francesco Rigoli, Bruno Averbeck, Sukhwinder S Shergill

Abstract read
In one paragraph

Article in Schizophrenia research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing 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

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

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Motor System-Dependent Effects of Amygdala and Ventral Striatum Lesions on Explore-Exploit Behaviors.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2024
    Article
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Midbrain circuits of novelty processing.Neurobiology of learning and memory · 2020
    Review
  14. Review
  15. 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

4 authors.

Cristina MartinelliDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, De Crespigny Park, SE5 8AF London, United Kingdom. Electronic address: cristina.martinelli@kcl.ac.uk.
Francesco RigoliWellcome Trust Centre for Neuroimaging, University College London, 12 Queen's Square, WC1N 3BG London, United Kingdom.
Bruno AverbeckLaboratory of Neuropsychology, National Institute of Mental Health, National Institute of Health, Bethesda, MD 20892-4415, USA.
Sukhwinder S ShergillDepartment of Psychosis Studies, Institute of Psychiatry, Psychology & Neuroscience, King's College London, De Crespigny Park, SE5 8AF London, United Kingdom.

Funding

Frontal Striatal Systems and Dopamine in Normal and Pathological BehaviorZIAMH002928 · NIMH · NATIONAL INSTITUTE OF MENTAL HEALTH · PI AVERBECK, BRUNO · 2010 to 2025
$29.0M
Intramural NIH HHS ZIA MH002928Medical Research Council G0901868
6 · The paper itself

Abstract

Influential models of schizophrenia suggest that patients experience incoming stimuli as excessively novel and motivating, with important consequences for hallucinatory experience and delusional belief. However, whether schizophrenia patients exhibit excessive novelty value and whether this interferes with adaptive behaviour has not yet been formally tested. Here, we employed a three-armed bandit task to investigate this hypothesis. Schizophrenia patients and healthy controls were first familiarised with a group of images and then asked to repeatedly choose between familiar and unfamiliar images associated with different monetary reward probabilities. By fitting a reinforcement-learning model we were able to estimate the values attributed to familiar and unfamiliar images when first presented in the context of the decision-making task. In line with our hypothesis, we found increased preference for newly introduced images (irrespective of whether these were familiar or unfamiliar) in patients compared to healthy controls and this to correlate with severity of hallucinatory experience. In addition, we found a correlation between value assigned to novel images and task performance, suggesting that excessive novelty value may interfere with optimal learning in patients, putatively through the disruption of the mechanisms regulating exploration versus exploitation. Our results suggest excessive novelty value in patients, whereby even previously seen stimuli acquire higher value as the result of their exposure in a novel context - a form of 'hyper novelty' which may explain why patients are often attracted by familiar stimuli experienced as new.

Indexed as

Reinforcement, PsychologyAdolescentAdultAnalysis of VarianceComprehensionDecision MakingExploratory BehaviorFemaleHallucinationsHumansImaginationMaleMiddle AgedMotivationSchizophreniaStatistics as TopicAberrant salienceDecision-makingNoveltyNovelty-seekingPsychosisSchizophrenia

Identifiers

PMID28495493
PMCPMC5890442

What OpenQuestion holds

Textmetadata
LicenceTDM
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.