Cited by 88Schizophrenia research and treatmentMental Health and PsychiatryHallucinations in medical conditions

Perceptual instability in schizophrenia: Probing predictive coding accounts of delusions with ambiguous stimuli

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Schmack, Katharina, Schnack, Alexandra, Priller, Josef, Sterzer, Philipp·2015·Schizophrenia Research Cognition

Abstract

BACKGROUND: Delusions, a core symptom of schizophrenia, are thought to arise from an alteration in predictive coding mechanisms that underlie perceptual inference. Here, we aimed to empirically test the hypothesized link between delusions and perceptual inference. METHOD: 28 patients with schizophrenia and 32 healthy controls matched for age and gender took part in a behavioral experiment that assessed the influence of stabilizing predictions on perception of an ambiguous visual stimulus. RESULTS: Participants with schizophrenia exhibited a weaker tendency towards percept stabilization during intermittent viewing of the ambiguous stimulus compared to healthy controls. The tendency towards percept stabilization in participants with schizophrenia correlated negatively with delusional ideation as measured with a validated questionnaire. CONCLUSION: Our results indicate an association between a weakened effect of sensory predictions in perceptual inference and delusions in schizophrenia. We suggest that attenuated predictive signaling during perceptual inference in schizophrenia may yield the experience of aberrant salience, thereby providing the starting point for the formation of delusions.

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Crossref · 10.1016/j.scog.2015.03.005

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  • An additional or complementary mechanism for the persistence of delusions could be an imbalance between priors at low and high levels of the predictive coding hierarchy.

    “An additional (or complementary) mechanism could be related to an imbalance between priors at low and high levels of the predictive coding hierarchy, as suggested by a series of studies investigating perceptual inference in relation to delusions (72, 105–107).”

    From The Predictive Coding Account of Psychosis (2018) · cites this paper as [105]

    The Discussion links attenuated sensory predictions to the formation of delusional interpretations and considers a possible disturbance of feedback predictions at higher levels of the cortical hierarchy. It says further work is needed to distinguish possible mechanisms; it does not establish an imbalance between low- and high-level priors or address the persistence of delusions. The indexed copy provides no page numbers for these passages. (LLM, conf=0.82)

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Authors
Schmack, K., Schnack, A., Priller, J., & Sterzer, P.
Affiliations
  • Charité – Universitätsmedizin Berlin (DE)
  • Berlin Institute of Health at Charité - Universitätsmedizin Berlin (DE)
  • Humboldt-Universität zu Berlin (DE)
Corresponding author
Schmack, Katharina
Venue
Schizophrenia Research Cognition
Publisher
Elsevier BV
Published
2015-06
Volume
2
Issue
2
Pages
72-77
ISSN
2215-0013 (ISSN-L)
OpenAlex
W2129453768
Cited by
88
References
49
Citations by year
2026: 13 · 2025: 7 · 2024: 10 · 2023: 11 · 2022: 5 · 2021: 8 · 2020: 9 · 2019: 5 · 2018: 10 · 2017: 7 · 2016: 3
FWCI
5.41
Type
journal article
Language
en
Open access
Locations
  • Schizophrenia Research Cognition (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • DZNE Pub (submittedVersion, other-oa)
Funders
  • Deutsche Forschungsgemeinschaft (STE-1430/7-1, 1430/7-1, STE 1430/2-1)
  • Berlin Institute of Health
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Schizophrenia research and treatment
  • Social Sciences › Arts and Humanities › Philosophy › Mental Health and Psychiatry
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Hallucinations in medical conditions
Keywords
schizophrenia, delusions, predictive coding, perceptual inference, perceptual stabilization, ambiguous visual stimuli, delusional ideation, aberrant salience, sensory prediction

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