Overview
This observational study will examine behavioral and electroencephalography measures related to state representation in individuals with early psychosis and healthy control participants.
Participants will complete clinical interviews, self-report measures, cognitive assessments, computerized behavioral tasks, and EEG assessments. The study will evaluate performance and computed parameters from the Translational Orientation Pattern Expectancy task and Translational Bandit Task, along with EEG variables related to cognitive control, reward processing, and neural synchrony.
The study aims to better understand heterogeneity in early psychosis and identify neurocognitive and neurophysiologic markers that may inform future precision psychiatry approaches.
Description
State Representation in Early Psychosis 2 is an observational study of individuals with early psychosis and healthy control participants. The study is part of an NIH Silvio O. Conte Center for Translational Mental Health Research grant and is designed to examine behavioral and neural markers of state representation processes in early psychosis.
The study will enroll individuals with early psychosis and demographically similar healthy controls. Participants will complete interviews, self-report measures, behavioral tasks, cognitive assessments, and electroencephalography assessments. The study focuses on computational and EEG measures related to state estimation, state maintenance, and state learning.
Participants will complete variants of two computerized tasks: the Translational Orientation Pattern Expectancy task and the Translational Bandit Task. EEG will be collected while participants complete these tasks and during resting state. EEG variables of interest include P300, reward positivity, phase synchrony, spectral power density slope, and prefrontal/parietal theta.
Clinical and functional measures will also be collected, including measures of psychiatric symptoms, functioning, motivation, pleasure, discrimination, disability, depression, anxiety, and general cognitive ability. The study will compare early psychosis participants with healthy control participants and evaluate how behavioral, computational, EEG, cognitive, clinical, and functional measures relate to heterogeneity in early psychosis.
Eligibility
Inclusion Criteria:
All participants:
- Aged between 15 and 45 years
- English proficiency, as determined by staff observation and participant self-report
- Estimated IQ at or above 70, as estimated by cognitive assessments
- Estimated visual acuity at 20/40, as estimated by the visual acuity test
Early Psychosis participants:
- Clinical diagnosis of schizophrenia, schizoaffective disorder, schizophreniform disorder, psychosis NOS, bipolar disorder with psychosis, or major depressive disorder with psychosis
- Age 35 years or younger, or age 36 to 45 years with onset of psychotic symptoms within the previous 5 years
- Achieved clinical stability, defined as outpatient status for at least one month prior to study participation
Exclusion Criteria:
All participants:
- Unable or unwilling to provide informed consent
- Unable to demonstrate adequate decisional capacity, in the judgment of the consenting study staff member
- Illiterate
- Previous clinically significant head injury or prolonged unconsciousness, as determined by the investigators
- Meets criteria for severe substance or alcohol use disorder within 3 months of behavioral assessment
- Presence of any major medical condition that, in the opinion of the investigators, would impede participation or put the participant at additional risk
- Has participated in significant formal cognitive training programs, as determined by the investigators
- Meets criteria for clinical risk of suicidal behavior
Early Psychosis participants:
\- Presence of a major neurological disorder
Healthy Control participants:
- Meets DSM-5 criteria for psychotic or bipolar disorder
- Has a first-degree family history of psychotic or bipolar disorder
- Presence of a major neurological disorder
