Exemplar: Determining the Best Practices for EMA Studies
Public ClinicalTrials.gov record NCT05194228. 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.
Ecological momentary assessment (EMA) is a measurement methodology that utilizes the repeated collection of real-time data on participants' behavior and experience in their natural environment. While EMA allows researchers to gain valuable insights into dynamic behavioral processes, the need for frequent self-report can be burdensome and disruptive to participants. Compliance with EMA protocols is important for accurate, unbiased sampling, yet there is no "gold standard" for EMA study design. In the present study, the investigators aim to use a factorial design to identify the optimal components, or combinations of components, for achieving the highest compliance rates for smartphone-based ecological momentary assessments (EMAs). Participants will be randomized into 1 of 32 conditions in a 2x2x2x2x2 design (i.e., number of questions per EMA survey \[15 vs. 25\] x number of EMAs per day \[2 vs. 4\] x EMA prompting schedule \[random vs. fixed times\]) x payment type \[per EMA vs. based on percentage of EMAs completed\] x order of EMA item question types \[i.e., slider type first 2 weeks vs. Likert-type questions first 2 weeks\]). All participants will complete EMAs for 4 weeks. The effect of each factor on EMA compliance will be examined, as well as the effects of interactions on EMA compliance. The investigators will also examine within and between-subjects factors that influence response rates, and 2) contextual features such as environment and mood that may be associated with better compliance and participant engagement. The results of this study will have broad applications for developing best practices guidelines for future studies utilizing EMA methodologies.
Study identification
- NCT ID
- NCT05194228
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 416 participants
Conditions and interventions
Eligibility (public fields only)
- Age range
- 18 Years to 99 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Nov 29, 2021
- Primary completion
- Oct 25, 2022
- Completion
- Oct 25, 2022
- Last update posted
- Jan 9, 2023
2021 – 2022
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Oklahoma Health Sciences Center | Oklahoma City | Oklahoma | 73104 | — |
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 NCT05194228, 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 Jan 9, 2023 · Synced Sep 10, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05194228 live on ClinicalTrials.gov.