Preventive Health CareStreaksNCT07220044
Effects of Streak-Based Versus Tally-Based Feedback on Daily Lesson Completion During a 30-Day Digital Health Challenge
A study testing Interventions for increasing engagement with a target behavior in people with Preventive Health Care, run by University of Pennsylvania at 1 site in United States.
Trial summary
The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Preventive Health Care
- What is being tested?
- Interventions for increasing engagement with a target behavior
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 7,004 participants
- Where
- 1 siteUnited States
- Study dates
- 23 Sep 2025to 21 Jan 2026
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Our target population is 18 and older adults in the United States who have a valid U.S. phone number and who are willing to make an account on our web application for use during the duration of the study.
Who cannot join
- Children under 18 years of age and adults without a valid U.S. phone number
Trial locations and contacts
1 site in 1 country.
United States1 site
University of Pennsylvania
Philadelphia, Pennsylvania, 19104
About this study
The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, users would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally.
Read the detailed description
The objective of this study is to determine whether tracking people's streak of behavior increases their engagement in that behavior. To test this, the investigators are designing a web application that participants can access daily using their phones or computers. Our previous work suggests that streaks may be useful in motivating people to be more productive. In this study, the investigators change how the investigators operationalize streaks and test streaks in a field context. Because most previous streak research is on how others perceive someone who has a streak, this work is novel because it examines how encouraging someone to achieve and keep a streak affects behavior in a field context. The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, users would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. The investigators are interested in whether people complete more daily lessons when a 30-day health challenge app provides daily feedback on their consecutive lessons (each comprising two multiple-choice questions) completed (i.e., "streaks") vs. when it provides feedback on their cumulative lessons completed (i.e., "tallies").
- Conditions
- Preventive Health Care
- Being tested
- Interventions for increasing engagement with a target behavior
- Keywords
- Behavioral Science, Field Experiment, Streaks
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Interventions for increasing engagement with a target behaviorBehavioural
The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, participants would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. The investigators are interested in whether people complete more daily lessons when a 30-day health challenge app provides daily feedback on their consecutive lessons (each comprising two multiple-choice questions) completed (i.e., "streaks") vs. when it provides feedback on their cumulative lessons completed (i.e., "tallies").
| Study group | Role | What they receive |
|---|---|---|
| Streaks | Experimental | In the streak group, participants would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak Receives: Behavioral: Interventions for increasing engagement with a target behavior |
| Tally | Experimental | In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. Receives: Behavioral: Interventions for increasing engagement with a target behavior |
What is being measured
The primary outcome is the main question the study is designed to answer.
Total number of lessons completed
The key dependent variable is a person's total number of lessons completed during the 30-day Health Daily program. Participants can only complete a given day's lesson on that day; a lesson is only considered complete if both questions that comprise the lesson are answered.
Measured: 30 days
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Oct 2025
- Study start23 Sep 2025
- Primary completion21 Jan 2026
- Study completion21 Jan 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Preventive Health CareStudies of the same condition, open and under way.
- More trials run by University of PennsylvaniaThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 7,004 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Pennsylvania
- Sponsor type
- University, hospital or other
- Collaborators
- National Institute on Aging (NIA)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07220044
- Sponsor's protocol ID
- DBSR-11288
- Other IDs
- P30AG034546-16
- Acronym
- Streaks
- Status last verified
- Feb 2026
- First submitted
- 21 Oct 2025
- Last updated
- 3 Feb 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: * Unique ID * Condition assignment * Response for the first quiz question for each day * Response for the second quiz question for each day * Date * Female indicator (taken from generize.io) * Correct response for the first quiz question * Correct response for the second quiz question
Study at a glance
From the registry record, last updated by the sponsor on 3 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effects of Streak-Based Versus Tally-Based Feedback on Daily Lesson Completion During a 30-Day Digital Health Challenge
- ClinicalTrials.gov ID
- NCT07220044
- Acronym / sponsor ID
- Streaks / DBSR-11288
- Conditions
- Preventive Health Care
- Keywords
- Behavioral Science, Field Experiment, Streaks
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 7,004 participants (actual)
- Lead sponsor
- University of PennsylvaniaUniversity, hospital or other
- Collaborators
- National Institute on Aging (NIA)
- Study start
- 23 Sep 2025 (actual)
- Primary completion
- 21 Jan 2026 (actual)
- Study completion
- 21 Jan 2026 (actual)
- First posted
- 23 Oct 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, users would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally.
Detailed description
The objective of this study is to determine whether tracking people's streak of behavior increases their engagement in that behavior. To test this, the investigators are designing a web application that participants can access daily using their phones or computers. Our previous work suggests that streaks may be useful in motivating people to be more productive. In this study, the investigators change how the investigators operationalize streaks and test streaks in a field context. Because most previous streak research is on how others perceive someone who has a streak, this work is novel because it examines how encouraging someone to achieve and keep a streak affects behavior in a field context. The study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, users would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. The investigators are interested in whether people complete more daily lessons when a 30-day health challenge app provides daily feedback on their consecutive lessons (each comprising two multiple-choice questions) completed (i.e., "streaks") vs. when it provides feedback on their cumulative lessons completed (i.e., "tallies").
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Streaks | Experimental | Behavioral: Interventions for increasing engagement with a target behaviorIn the streak group, participants would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak |
| Tally | Experimental | Behavioral: Interventions for increasing engagement with a target behaviorIn the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (1 listed)
- Our target population is 18 and older adults in the United States who have a valid U.S. phone number and who are willing to make an account on our web application for use during the duration of the study.
Key exclusion criteria (1 listed)
- Children under 18 years of age and adults without a valid U.S. phone number
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Interventions for increasing engagement with a target behaviorThe study will test two interventions for increasing engagement with a target behavior, delivered via a digital web application that participants can access using their phones or computers. For example, in the streak group, participants would see how many consecutive days they have completed daily lessons and will be encouraged to extend their streak. In the tally group, participants will see how many cumulative days they have completed daily lessons and will be encouraged to extend their tally. The investigators are interested in whether people complete more daily lessons when a 30-day health challenge app provides daily feedback on their consecutive lessons (each comprising two multiple-choice questions) completed (i.e., "streaks") vs. when it provides feedback on their cumulative lessons completed (i.e., "tallies"). | Behavioural | Streaks, Tally |
Primary outcome
Total number of lessons completed
Time frame: 30 days
The key dependent variable is a person's total number of lessons completed during the 30-day Health Daily program. Participants can only complete a given day's lesson on that day; a lesson is only considered complete if both questions that comprise the lesson are answered.
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Feb 2026.
- Individual participant dataSharing planned: Yes. * Unique ID * Condition assignment * Response for the first quiz question for each day * Response for the second quiz question for each day * Date * Female indicator (taken from generize.io) * Correct response for the first quiz question * Correct response for the second quiz question
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Interventions for increasing engagement with a target behavior in people with Preventive Health Care, run by University of Pennsylvania at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Total number of lessons completed (time frame: 30 days). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Feb 2026.