Risk Perception in Drug-Dependent Adults With and Without Schizophrenia
Public ClinicalTrials.gov record NCT01031563. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: * Several studies of risk perception have demonstrated a common bias known as unrealistic optimism, in which individuals feel they are less likely than other people to experience unpleasant or harmful events in their lives, but more likely to experience pleasant or beneficial events. * Previous research has indicated that individuals with schizophrenia have less of a sense of unrealistic optimism about adverse events than individuals without schizophrenia. However, research on risk perception in schizophrenia is sparse, primarily reporting on behaviors and decisions in the laboratory that likely are influenced by risk perception. * Risk perception among substance users may be viewed in two separate categories: perception of vulnerability to adverse events and perception of vulnerability to negative outcomes associated with substance use. Research in both areas has yielded mixed results. Researchers are interested in studying the connections among schizophrenia, addiction, and risk perception in order to develop better drug use prevention and treatment programs for people with and without schizophrenia. Objectives: \- To compare unrealistic optimism bias in people with and without schizophrenia and/or drug dependence, and its association with actual risky behavior. Eligibility: * Individuals between 18 and 64 years of age who fall into one of the following study categories: * diagnoses of both drug dependence (marijuana or cocaine) and schizophrenia/schizoaffective disorder * diagnosis of drug dependence only (marijuana or cocaine) * diagnosis of schizophrenia/schizoaffective disorder only * healthy volunteers with no history of drug use or serious mental disorder Design: * The study will require a single visit to the research center for a 5- to 6-hour session. * Participants will complete questionnaires on medical and behavioral history, complete tests of thinking skills like memory and attention, complete a brief computerized decision-making task, and answer questions about risk perception. * Participants will also provide urine samples and breath carbon monoxide measurements to test for recent use of tobacco and other substances.
Study identification
- NCT ID
- NCT01031563
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 120 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years to 64 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Aug 17, 2009
- Primary completion
- Not listed
- Completion
- May 2, 2012
- Last update posted
- Jul 1, 2017
2009 – 2012
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Maryland Psychiatric Research Center (MPRC) 55 Wade Avenue | Catonsville | Maryland | 21228 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01031563, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Jul 1, 2017 · Synced Sep 5, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01031563 live on ClinicalTrials.gov.