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Using Illusions to Boost Social Cognition (SOLLUSIONS)

19 maj 2026 uppdaterad av: Hôpital le Vinatier

Socio-cognitive Benefits of Exposure to Visual Illusions in Patients With Psychotic Disorders

This study aims to explore whether the observation of complex visual objects can help improve social cognition in people living with psychotic disorders. Social cognition refers to the ability to understand what others think, feel, or intend, and plays a key role in social relationships and daily interactions.

Main questions this study aims to answer:

  • Does dyadic exposure to complex visual objects improve mental state attribution, as measured by the Faux Pas Test?
  • Does the intervention enhance related domains of social cognition, including implicit intention inference (Hinting Task), interpretation of complex interactions (Movie for the Assessment of Social Cognition, MASC), and reduction of hostile attribution biases (Ambiguous Intentions Hostility Questionnaire, AIHQ)?
  • Are improvements maintained after one month, and do patients who receive the intervention later (waitlist group) show the same benefits once exposed?

Studieöversikt

Status

Har inte rekryterat ännu

Betingelser

Intervention / Behandling

Detaljerad beskrivning

This study is a randomized, controlled, monocentric trial evaluating a novel sensory-motor rehabilitation approach for social cognition. The study is based on the hypothesis that perception is interpretative and viewpoint-dependent, and that realizing this through concrete experience could generalize to higher-level cognitive processes required for social understanding.

Participants will attend three visits and complete questionnaires and tasks that assess social understanding before and after the activity, and again one month later.

Two groups will take part: one completing the workshop shortly after inclusion, and one completing it after a delay, allowing comparison over time. Participants will be randomized in one condition.

This research does not involve medication. It consists of simple tasks such as observing and describing visual stimuli, followed by a facilitated discussion.

Neuropsychological tests and questionnaires will be used to measure changes over time.

Expected impact: By inducing concrete perspective-shifts, the intervention aims to improve mentalizing, reduce egocentric biases, and strengthen interpretation of social cues. This bottom-up sensory-motor approach may overcome limitations of classical cognitive remediation programs by promoting deep experiential learning rather than top-down instruction.

If effective, the method may support long-term social reintegration, psychosocial functioning, and inspire wider clinical applications due to its low cost, ease of deployment, and strong ecological engagement.

Studietyp

Interventionell

Inskrivning (Beräknad)

60

Fas

  • Inte tillämpbar

Kontakter och platser

Det här avsnittet innehåller kontaktuppgifter för dem som genomför studien och information om var denna studie genomförs.

Studiekontakt

Studera Kontakt Backup

Studieorter

  • Frankrike
      • Bron, Frankrike, 69678
        • CH le Vinatier
        • Huvudutredare:
          • Frédéric HAESEBAERT, MD, PhD

Deltagandekriterier

Forskare letar efter personer som passar en viss beskrivning, så kallade behörighetskriterier. Några exempel på dessa kriterier är en persons allmänna hälsotillstånd eller tidigare behandlingar.

Urvalskriterier

Åldrar som är berättigade till studier

  • Vuxen

Tar emot friska volontärer

Nej

Beskrivning

Inclusion Criteria:

  • Aged 18 to 40 years
  • Fluent French speaker
  • Has provided written informed consent
  • For individuals under guardianship (curatorship): inclusion is permitted if the curator is available to assist or advise when needed.
  • Established diagnosis of schizophrenia, schizoaffective disorder, schizophreniform disorder, or brief psychotic disorder according to theDiagnostic and statistical manual of mental disorders (DSM-5-TR) criteria
  • Presence of social cognition impairment, defined by:subjective complaint reported by the participant or identified by care teams regarding difficulties in social interaction and clinical confirmation of observable difficulties (e.g., social withdrawal, misinterpretation of others' intentions, inappropriate social behaviour)
  • Membership or entitlement to a social security plan

Exclusion Criteria:

  • Clinical state incompatible with participation in group-based activities (e.g., severe psychomotor agitation, severe behavioural disturbance)
  • Concurrent participation in another social cognition remediation program
  • Diagnosis of intellectual disability
  • Insufficient comprehension of French for verbal interaction and test completion
  • Significant change in psychotropic medication within the past month
  • Uncorrectable visual impairment preventing participation
  • Pregnant women
  • Individuals under full guardianship (tutorship)

Studieplan

Det här avsnittet ger detaljer om studieplanen, inklusive hur studien är utformad och vad studien mäter.

Hur är studien utformad?

Designdetaljer

  • Primärt syfte: Stödjande vård
  • Tilldelning: Randomiserad
  • Interventionsmodell: Parallellt uppdrag
  • Maskning: Ingen (Open Label)

Vapen och interventioner

Deltagargrupp / Arm
Intervention / Behandling
Experimentell: Immediate intervention
Participants receive the visual-perception session shortly after baseline assessment. They complete neurocognitive and social cognition tests before exposure, immediately after, and again at one-month follow-up.
Beteende: Visual-illusion social cognition session (immediate)

A guided session of approximately 45 minutes. The core rehabilitation tool consists of multiple-perspective illusion boxes. Each participant stands on one side of the box and perceives a different shape than their partner. The session unfolds in 3 structured phases:

  1. For each illusion : Participants observe objects silently and draw what they see.
  2. Perspective confrontation + Card selection: Drawings and interpretation cards are exchanged and discussed.
  3. Perspective switching : Participants swap positions to reveal the alternative visual interpretation.

The session is followed by a short structured discussion with a psychologist focused on perspective-taking and interpretation of social cues.
Aktiv komparator: Delayed Intervention (Wait-list Control)
Participants complete the same assessments as Arm 1 but receive the intervention only after a waiting period. This arm allows comparison between natural progression and workshop effects prior to exposure.
Beteende: Visual-illusion social cognition session (delayed)
A guided session of approximately 45 minutes. The core rehabilitation tool consists of multiple-perspective illusion boxes. Each participant stands on one side of the box and perceives a different shape than their partner. The session unfolds in 3 structured phases: 1. For each illusion : Participants observe objects silently and draw what they see. 2. Perspective confrontation + Card selection: Drawings and interpretation cards are exchanged and discussed. 3. Perspective switching : Participants swap positions to reveal the alternative visual interpretation. The session is followed by a short structured discussion with a psychologist focused on perspective-taking and interpretation of social cues. Delivered after a delay following baseline assessment.

Vad mäter studien?

Primära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
"Faux Pas" test total score
Tidsram: Change from pre to post intervention (up to 3 hours)
  1. Total of correctly recognised "Faux Pas" Score range : 0 - 30 Minimum (0) : no correct detection of faux pas Maximum (30) : all faux pas correctly detected
  2. Total of identified absence of "Faux Pas" Score range : 0 - 10 Minimum (0) : incorrectly identifies absence of faux pas Maximum (10) : correctly identifies absence of faux pas
  3. Total score of control question comprehension Score range : 0 - 20 Minimum (0) : poor comprehension Maximum (20) : Full comprehension
Change from pre to post intervention (up to 3 hours)

Sekundära resultatmått

Resultatmått
Åtgärdsbeskrivning
Tidsram
Hinting Task
Tidsram: Change from pre to post intervention (up to 3 hours)
  1. Number of correctly inferred items with hint 1 Score range : 0 - 20 Minimum (0) : No correct inference of intentions Maximum (20) : All intentions correctly inferred
  2. Number of correctly inferred items with hint 2 Score range : 0 - 20 Minimum (0) : No correct inference of intentions Maximum (20) : All intentions correctly inferred
Change from pre to post intervention (up to 3 hours)
MASC performance
Tidsram: Change from pre intervention to follow-up session (up to a month and a half)
Number of correct responses Score range 0 - 45 Minimum (0) : No correct mental state inference Maximum (45) : All mental states correctly inferred
Change from pre intervention to follow-up session (up to a month and a half)

Samarbetspartners och utredare

Det är här du hittar personer och organisationer som är involverade i denna studie.

Sponsor

Hôpital le Vinatier

Samarbetspartners

INSERM 1028

Studieavstämningsdatum

Dessa datum spårar framstegen för inlämningar av studieposter och sammanfattande resultat till ClinicalTrials.gov. Studieposter och rapporterade resultat granskas av National Library of Medicine (NLM) för att säkerställa att de uppfyller specifika kvalitetskontrollstandarder innan de publiceras på den offentliga webbplatsen.

Studera stora datum

Studiestart (Beräknad)

1 juli 2026

Primärt slutförande (Beräknad)

1 januari 2029

Avslutad studie (Beräknad)

1 februari 2029

Studieregistreringsdatum

Först inskickad

12 maj 2026

Först inskickad som uppfyllde QC-kriterierna

19 maj 2026

Första postat (Faktisk)

22 maj 2026

Uppdateringar av studier

Senaste uppdatering publicerad (Faktisk)

22 maj 2026

Senaste inskickade uppdateringen som uppfyllde QC-kriterierna

19 maj 2026

Senast verifierad

1 maj 2026

Mer information

Termer relaterade till denna studie

Nyckelord

Ytterligare relevanta MeSH-villkor

Andra studie-ID-nummer

  • 2025-A02057-42

Plan för individuella deltagardata (IPD)

Planerar du att dela individuella deltagardata (IPD)?

JA

IPD-planbeskrivning

Anonymized IPD that underlie results in a publication may be shared upon reasonable scientific request following publication of study results.

Tidsram för IPD-delning

IPD available after publication of primary results

Kriterier för IPD Sharing Access

Requests must be made by qualified researchers for scientific purposes. Data will be shared under controlled access agreement ensuring privacy and ethical standards.

IPD-delning som stöder informationstyp

  • STUDY_PROTOCOL
  • SAV

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