Visual Perception in Schizophrenia

NCT ID: NCT06911931

Last Updated: 2025-11-12

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

84 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-11-03

Study Completion Date

2027-01-31

Brief Summary

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This study aims to identify novel markers of psychosis using electroencephalography (EEG).

Detailed Description

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Conditions

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Schizophrenia Disorders Bipolar Disorder Schizo Affective Disorder

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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All participants

Group Type EXPERIMENTAL

EEG measure of visual processing

Intervention Type OTHER

Non-invasive scalp EEG measure of early cortical visual processing.

Interventions

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EEG measure of visual processing

Non-invasive scalp EEG measure of early cortical visual processing.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* All Subjects
* Aged 18-65
* 20/32 visual acuity or better (using in-house optical correction, if necessary)
* An ability to speak English well enough to complete study assessments and to consent to the study
* Subjects with Schizophrenia-Spectrum Disorder
* Meets DSM-5 diagnostic criteria for schizophrenia, schizoaffective disorder, or schizophreniform disorder as confirmed by the Structured Interview for DSM-5 (SCID-5).
* Subjects with Bipolar Disorder
* Meets DSM-5 diagnostic criteria for bipolar disorder (type I, II, or unspecified) as confirmed by the Structured Interview for DSM-5 (SCID-5).

Exclusion Criteria

* All subjects
* Presence of characteristics that could impair one's ability to comprehend the nature of the study, provide informed consent, or understand the assessment questions, including the following:

* Subject cannot read and understand the instructions well enough to complete the tasks or cannot provide informed consent.
* Intellectual impairment (WRAT-5 score \< 70) (at the discretion of experimenter);
* Actively intoxicated, as shown via patient self-report or staff report;
* Substance use disorder in the past 3 months;
* Subject considered high risk for suicidal acts (i.e., active suicidal ideation as determined by clinical interview OR any suicide attempt in 30 days prior to screening);
* Subject violence (involving severe/lethal means or violence occurring in prior 6 months) or extreme agitation.
* Being in a current manic state
* Head injury with loss of consciousness greater than 10 minutes (at the discretion of the experimenter).
* Subject has had electroconvulsive therapy (ECT) in the past 8 weeks;
* Diagnosed with a neurological condition (tumor, stroke, brain injury) or neurological disorder, including seizure disorders. Diagnosed with pervasive developmental disorder (phone screen or medical records)
* Lazy eye or squint or other known ocular pathology
* Healthy Control Subjects
* Any lifetime psychotic disorder or history of psychiatric hospitalization (self disclosure);
* Daily antidepressant, mood stabilizer or antipsychotic medication use in the last 6 months, or benzodiazepine use during the prior 2 days (self-disclosure); iii. First-degree relative(s) with a schizophrenia spectrum disorder (based on subject self-report) or bipolar disorder.
* Case-match Control Non-ill Subjects
* Any lifetime psychotic disorder (as assessed by SCID/or SSD);
* Recurrent depressive episodes or being in a current depressive episode (as assessed by SCID/or SSD)
* Persistent threshold psychotic symptoms
* History of psychiatric hospitalization;
* Daily antidepressant, mood stabilizer or antipsychotic medication use in the last 6 months, or benzodiazepine use during the prior 2 days
* First-degree relative(s) with a schizophrenia spectrum disorder (based on subject self-report) or bipolar disorder.
* Bipolar Subjects
* Persistent threshold psychotic symptoms
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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National Institute of Mental Health (NIMH)

NIH

Sponsor Role collaborator

University of Rochester

OTHER

Sponsor Role lead

Responsible Party

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Edmund Lalor

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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University of Rochester

Rochester, New York, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Edmund Lalor, PhD

Role: CONTACT

Phone: 585-275-3077

Email: [email protected]

Facility Contacts

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Edmund Lalor, PhD

Role: primary

Other Identifiers

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R21MH140245

Identifier Type: NIH

Identifier Source: secondary_id

View Link

STUDY00007500

Identifier Type: -

Identifier Source: org_study_id