Recruiting
Geolocation Positional System (GPS) Experience
The purpose of this study is to use smartphone technology to capture individual location emotional and cognitive data, to examine how real-world behaviors thoughts, emotions, and brain activity are related to one another.
ClinicalTrials.gov IDNCT05991713
PhaseNA
Enrollment100
SponsorUniversity of Miami
Age18 Years
SexALL
Conditions studied
Emotions, Anhedonia, Depression
About this study
The purpose of this study is to use smartphone technology to capture individual location emotional and cognitive data, to examine how real-world behaviors thoughts, emotions, and brain activity are related to one another.
Interventions
- Behavioral: Modifying Exploration — Participants in this group will use a mobile phone sensor data application that uses an accelerometer, Wireless Fidelity (WiFi) and/or GPS designed for smartphone devices. This technology allows the phones to capture information automatically and passively on the participant's activity. The application will be collecting participants' data 24 hours a day, 7 days a week. Participants will be asked to make alterations to their exploration levels approximately 20 days of their participation in the study.
Primary outcomes
- Change in positive emotional response as measured by ecological momentary assessment (Baseline, up to 6 months)
Eligibility information
Inclusion Criteria:
* Must agree to give informed consent
* Must be willing to have an functional Magnetic Resonance Imaging (FMRI) scan
* Must be able to receive and respond to daily text messages assessing current emotion
* Must be willing to download and run a GPS tracking application (FollowMee) onto their smartphone for a four-month period
Exclusion Criteria:
* history of head trauma, seizures, or neurological disorders
* severe/unstable medical conditions
* conditions that interfere with MRI
* pregnancy
* lifetime psychotic/bipolar disorder
* chronic/severe substance or alcohol abuse/dependence
* antipsychotic medication
Study locations
- University of Miami, Coral Gables, Florida 33146 United States
Before you participate: Varda Clinical is an independent discovery tool, not the study sponsor or a medical provider. Eligibility can only be determined by the official study team. Discuss potential risks and benefits with a qualified healthcare professional.
Source: ClinicalTrials.gov. Record last refreshed by Varda Clinical: 2026-09-27.