University of Florida
This study looks at the moments when college students feel a strong emotional swing, and how those moments relate to reacting online when upset, drinking alcohol, and eating in response to emotions. Participants wear a wrist device and answer brief check-ins on their phone several times a day for about five weeks. During part of that time, a study app sometimes sends a short coping message at moments when the wrist device and check-ins suggest emotions are shifting quickly. Whether a message is sent at any given moment is decided at random, and the study compares what participants do in the short window afterward. An optional part of the study collects one small hair sample, which is tested for two hormones related to stress and to status-linked behavior, so the researchers can see whether longer-term hormone levels relate to how people respond in the moment. The study is a pilot designed to test whether the approach works and to estimate how large its effects are.
REACT is a five-week micro-randomized trial in University of Florida students age 18 and older. Participants complete a baseline battery, wear a Garmin Venu 3, and respond to five to six smartphone check-ins per day. Week one is a no-prompt run-in that establishes each participant's own baseline distribution of momentary affective variability, indexed by the mean square of successive differences on consecutive affect ratings. From week two through week five, the app evaluates up to six decision points per day. A decision point is flagged when the participant's current variability exceeds their…
Inclusion Criteria: * Currently enrolled University of Florida student * Age 18 years or older * Owns a smartphone used daily * Willing to wear a wrist-worn device and complete brief check-ins several times daily for approximately five weeks * For the optional hair biomarker sub-study only: at least approximately 1 cm of hair at the posterior vertex, no scalp wound, rash, or dermatologic treatment at the collection site, and natural hair growth accessible at the collection site Exclusion Criteria: * Varsity student-athlete governed by the university athletic association * Unable to complete…
A single short message of one to three sentences delivered to the participant's smartphone at a randomized decision point, taking roughly fifteen to thirty seconds to read. Messages apply cognitive-behavioral techniques including thought records, perspective-taking, decatastrophizing, cost-benefit checks, implementation intentions, and behavioral redirection, or acceptance-based techniques including cognitive defusion, acceptance, values anchoring, urge surfing, and present-moment grounding. Delivery is capped at four messages per day with a minimum sixty-minute interval and is confined to participant-set waking hours. Messages may be dismissed without responding.
A brief neutral acknowledgment message matched to the coping messages on delivery mechanism and approximate length, containing no coping technique or behavioral suggestion.
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