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NCT Number: NCT07666672

Digital Coach to Support Exposure Therapy Homework for Anxious Youth

This study is testing a digital tool called BraveBot for young people who are receiving cognitive behavioral therapy (CBT) for anxiety, OCD, or related problems. BraveBot is a computer program, not a person. It talks with youth through their phone or computer while they do "face-your-fears"-style exposure therapy homework that their therapist has assigned. Sometimes an exposure is done with BraveBot's real-time coaching, and sometimes on their own; after each exposure, youth answer a few short questions about how it went.

Rather than dividing participants into separate groups, the study randomizes each individual exposure homework assignment. Every time a young person opens an eligible exposure, the system makes a 1:1 random assignment deciding whether that exposure is completed with BraveBot's support or independently (self-guided).

The main goal is to learn whether using BraveBot helps youth understand their exposure assignments better, put in more effort, stick with exposures when they are hard, feel more capable, and find exposures more helpful in "fighting back" against anxiety. The study also examines whether BraveBot increases the likelihood that assigned exposures are completed, and explores effects on anxiety symptoms and how safe, easy to use, and useful BraveBot feels for youth, their therapists, and parents.

BraveBot does not replace the therapist, diagnose, or design exposures; it only supports the homework the clinician has assigned, and is used under clinician oversight. A built-in safety system can detect possible risk-related language, pause the session, show crisis resources (such as 988), and notify the treating clinician. The study is conducted within routine outpatient psychology clinics at Mass General Brigham. Up to 40 youth ages 12-22 will take part.

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Key information

Conditions

Anxiety Disorders Mental Disorders OCD

Age range

12 year–22 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

McLean Hospital, Belmont, Massachusetts, United States

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About this study

Design. Open-label, within-participant, exposure-instance-level randomized trial embedded in routine outpatient exposure-based CBT at Mass General Brigham clinics. The unit of randomization is the individual clinician-assigned, "BraveBot-eligible" exposure homework instance. Each time a youth opens the link for a BraveBot-eligible exposure delivered via SMS reminder, the backend system immediately randomizes that single instance 1:1 to BraveBot-assisted vs self-guided completion.

Intervention. BraveBot is a scope-limited, clinician-supervised, large language model (GPT)-powered audio-to-audio conversational assistant (provided by TheraLoop AI, Inc.) that supports completion of clinician-assigned exposure homework. For BraveBot-assisted instances it clarifies the assignment and rationale, collects Subjective Units of Distress (SUDS) ratings and expectations, encourages persistence when anxiety rises, prompts about safety behaviors and "white-knuckling" at mid-exposure check-ins, and guides brief end-of-exposure reflection. It does not diagnose, generate exposure hierarchies, or make treatment decisions. For self-guided instances, the youth completes the same assigned exposure independently and then completes the same post-exposure survey.

Aims.

Aim 1 (primary): whether BraveBot improves exposure-homework QUALITY, assessed by five youth-reported 0-100 ratings per completed instance (Effort, Perceived Capability, Understanding, Ability to Continue, Perceived Helpfulness).

Aim 2 (secondary): whether BraveBot increases exposure-homework ADHERENCE (probability that a randomized instance is completed).

Aims 3-5 (exploratory): preliminary effects on clinical outcomes (RCADS anxiety, CALIS-C life interference, IUSC intolerance of uncertainty) and associations with exposure-related processes; acceptability/usability/burden among youth, clinicians, and parents; and the performance and burden of BraveBot's automated risk-detection and clinician-notification (safety) workflow.

Participants and schedule. Up to 40 youth ages 12-22 with a clinical or subclinical anxiety or related disorder for which exposure-based CBT is indicated. BraveBot access remains active for up to 45 homework-reminder days (about six weeks), with a 12-week backstop (i.e., 84 calendar days). Standardized self-report measures are collected at baseline (pre-BraveBot), at the end of the active BraveBot period, and at a ~3-week follow-up. A separate population of up to 10 clinicians may voluntarily enroll to use the BraveBot system with their patients and complete surveys about their experience.

Analysis. Primary outcomes are analyzed with linear mixed-effects models (fixed effect of condition; random intercepts for youth, and clinician/site as needed), with Benjamini-Hochberg false-discovery-rate correction across the five co-primary outcomes. Adherence is analyzed with a binomial-logit generalized linear mixed-effects model.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

(youth participants):

  • Has a clinical or subclinical anxiety or related disorder (e.g., panic disorder, social anxiety disorder, obsessive-compulsive disorder) for which exposure-based CBT is indicated.
  • Between the ages of 12 and 22 years at the time of enrollment.
  • Is either (a) currently receiving exposure-based CBT (or CBT in which exposure-based content is expected to be a core component) at a participating MGB outpatient program, or (b) on the waitlist for a participating program and expected to initiate exposure-based CBT in the near future.
  • Sufficient ability to communicate in English (study materials, measures, and the BraveBot interface are currently English-only). For minors, at least one parent/guardian must be sufficiently proficient in English to understand the consent information.
  • The youth and/or caregiver has access to a device that can receive SMS text reminders and open secure web links to complete exposure homework and brief post-exposure surveys.

Exclusion criteria

(present at enrollment):

  • Symptoms of suicidal or homicidal ideation, psychosis, or a non-anxiety-related primary mental health concern (i.e., where treatment for a disorder other than anxiety is indicated prior to exposure treatment, or independent exposure homework is not clinically appropriate as determined by the treating clinician). Examples include: current substance use or dependence requiring specialized or higher-level care that must be addressed before or instead of anxiety-focused exposure-based CBT; and current eating disorder severe enough to require intensive/specialized treatment such that exposure-based CBT for anxiety/OCD is not the appropriate primary focus.
  • Youth is unable to complete homework independently.
  • Any other condition or circumstance for which treatment for another primary psychiatric condition is clearly indicated prior to anxiety-focused exposure-based CBT, or for which out-of-session exposure homework is considered unsafe or inappropriate.

The investigators will also recruit up to 10 clinicians at participating programs who may use the BraveBot system with their patients (who have enrolled in the study independently) and complete brief baseline and end-of-study surveys.

Treatment and study plan

BraveBot

Behavioral

Scope-limited, clinician-supervised, GPT-powered audio-to-audio conversational assistant delivered via a secure web link in SMS reminders. Supports clinician-assigned exposure homework by clarifying instructions and rationale, collecting SUDS, encouraging persistence, prompting about safety behaviors and white-knuckling, and guiding post-exposure reflection. Includes an automated risk-detection workflow that pauses the session, shows crisis resources, and notifies the treating clinician.

Other names: BraveBot by TheraLoop AI, Inc.

Self-Guided Exposure Therapy Homework

Behavioral

The youth completes the same clinician-assigned exposure independently, without BraveBot coaching (standard between-session homework).

Primary outcomes

  1. Exposure Quality -- Effort (0-100)

    Time frame: Immediately after each completed, randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Youth-reported effort put into the exposure, rated on a 0-100 slider after each completed randomized exposure instance. Minimum 0, maximum 100; higher scores indicate greater effort (better).

  2. Exposure Quality -- Perceived Capability (0-100)

    Time frame: Immediately after each completed, randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Youth-reported sense of being capable to approach or handle anxiety-provoking situations, rated on a 0-100 slider after each completed randomized exposure instance. Minimum 0, maximum 100; higher scores indicate greater perceived capability (better).

  3. Exposure Quality -- Understanding (0-100)

    Time frame: Immediately after each completed, randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Youth-reported understanding of what to do and why during the exposure, rated on a 0-100 slider after each completed randomized exposure instance. Minimum 0, maximum 100; higher scores indicate greater understanding (better).

  4. Exposure Quality -- Ability to Continue When Distressed (0-100)

    Time frame: Immediately after each completed, randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Youth-reported ability to stay with the exposure when it was difficult or distressing, rated on a 0-100 slider after each completed randomized exposure instance. Minimum 0, maximum 100; higher scores indicate greater ability to continue (better).

  5. Exposure Quality -- Perceived Helpfulness (0-100)

    Time frame: Immediately after each completed, randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Youth-reported helpfulness of the exposure in reducing anxiety, rated on a 0-100 slider after each completed randomized exposure instance. Minimum 0, maximum 100; higher scores indicate greater perceived helpfulness (better).

Secondary outcomes

  1. Exposure-homework Adherence

    Time frame: For each randomized exposure instance during the active BraveBot period (up to 45 homework-reminder days, or the 12-week backstop).

    Proportion of randomized exposure instances classified as Complete (vs. Incomplete), compared between BraveBot-assisted and self-guided conditions. Completion is determined automatically from condition-specific workflow flags. Reported as a proportion (0-1); a higher completion proportion for BraveBot-assisted vs. self-guided is better.

Other outcomes

  1. Revised Children's Anxiety and Depression Scale (RCADS) - Total Anxiety (youth-report)

    Time frame: Baseline, end of active BraveBot period (average of ~6 weeks, up to max of 12 weeks), and follow-up (3 weeks following end of active BraveBot period).

    Anxiety symptom measure; each item scored 0 (Never) to 3 (Always). The Total Anxiety score is the sum of the five anxiety subscales (separation anxiety, social phobia, generalized anxiety, panic, obsessive-compulsive). Total Anxiety score range 0-111; higher scores indicate greater anxiety symptoms (worse).

  2. Child Anxiety Life Interference Scale (CALIS) (youth-report)

    Time frame: Baseline, end of active BraveBot period (average of ~6 weeks, up to max of 12 weeks), and follow-up (3 weeks following end of active BraveBot period).

    Self-report measure of anxiety-related interference in the child's daily life. Each of the 8 items are rated on a 0-4 scale. Total score range 0-32; higher scores indicate greater anxiety-related life interference (worse).

  3. Intolerance of Uncertainty Scale-Child (IUSC) (youth-report)

    Time frame: Baseline, end of active BraveBot period (average of ~6 weeks, up to max of 12 weeks), and follow-up (3 weeks following end of active BraveBot period).

    Self-report measure of intolerance of uncertainty; items rated 1-5. Total score range 27-135; higher scores indicate greater intolerance of uncertainty (worse).

  4. Memory for Treatment Content (youth-report)

    Time frame: End of active BraveBot period (average of ~6 weeks, max of 12 weeks) and follow-up (3 weeks later).

    Vignette-based, multiple-choice assessment of memory for exposure-CBT principles, scored as proportion correct (0-100%); higher scores indicate better memory for treatment content (better).

  5. Developmentally Adapted or Original Version of the System Usability Scale (SUS) (youth- and clinician-report)

    Time frame: End of active BraveBot period for youth (i.e., ~6 weeks on average, max of 12 weeks); end of study for clinicians (anticipated to be one year after recruitment begins).

    Standardized usability measure of the BraveBot system (developmentally adapted for youth; standard version for clinicians). Score range 0-100; higher scores indicate better perceived usability (better).

  6. Global Post-BraveBot Peference/Acceptability ratings (youth-report)

    Time frame: End of active BraveBot period (i.e., ~6 weeks on average, max of 12 weeks).

    Youth-reported 0-100 slider ratings comparing BraveBot-assisted vs. self-guided exposure (e.g., effort, persistence, understanding, helpfulness, enjoyment, preference, future use, safety, willingness to recommend). Each item: minimum 0, maximum 100; higher scores indicate a more favorable rating of BraveBot.

  7. Clinician Attitudes Toward AI

    Time frame: At baseline (orientation) and end of study (anticipated to be one year after recruitment begins)

    Clinician-reported AI-attitudes scale at orientation (items rated on 1-5 scale; total scores range from 7 to 35); higher scores indicate more favorable attitudes.

  8. Clinician Questionnaire - Global Feedback on BraveBot

    Time frame: End of study (anticipated to be one year after recruitment begins).

    0-100 global ratings of BraveBot's effects on exposure homework, workflow fit, acceptability, and clinical alignment, plus open-text feedback; higher scores indicate more favorable ratings.

  9. Novel Parent/Caregiver Perceptions of BraveBot Questionnaire

    Time frame: At the end of the youth participant's active BraveBot period (i.e., ~6 weeks on average, max of 12 weeks).

    For parents/caregivers of youth participants under 18 years of age, 0-100 sliders comparing BraveBot-supported vs self-guided exposure homework (e.g., child willingness/engagement, persistence during distress, independence from parent, parent-child conflict/stress, structure/guidance, comfort/appropriateness, future preference, and concerns about AI).

  10. Number of Automated Safety Alerts

    Time frame: Throughout the active BraveBot period (i.e., average of 6 weeks; up to 12 weeks at most).

    Count of automated safety alerts generated by BraveBot's risk-detection workflow during BraveBot-assisted exposures. Reported as a count.

  11. Clinician Response Time to Safety Alerts

    Time frame: Throughout the active BraveBot period (i.e., average of 6 weeks; up to 12 weeks at most).

    Time from generation of an automated safety alert to documented clinician review, in hours. Reported as hours.

  12. Proportion of Safety Alerts Classified as True Positive vs. False Positive

    Time frame: Throughout the active BraveBot period (i.e., average of 6 weeks; up to 12 weeks at most).

    Among automated safety alerts reviewed by clinicians, the proportion classified as genuine concern (true positive) vs. false positive. Reported as a percentage.

  13. Number of Clinician-Initiated Manual Safety Flags

    Time frame: Throughout the active BraveBot period (i.e., average of 6 weeks; up to 12 weeks at most).

    Count of safety concerns flagged by clinicians that were not captured by the automated workflow (potential false negatives). Reported as a count.

  14. Number of Youth-Reported "I Felt Unsafe" Responses

    Time frame: Throughout the active BraveBot period (i.e., average of 6 weeks; up to 12 weeks at most).

    Count of post-exposure surveys on which a youth endorsed the "I felt unsafe" item. Reported as a count.

Study contacts

Contact information is provided by the study sponsor or research team.

Joshua S Steinberg, MA

CONTACT

[email protected]

6179453115

Sponsors and collaborators

Lead sponsor

Massachusetts General Hospital

Other

Collaborators

  • Harvard University
  • Mclean Hospital
  • TheraLoop AI, Inc.

Registry information

Official study title

Randomized Controlled Trial of the BraveBot Intervention as an Adjunctive Treatment for Young People With Anxiety and Related Disorders Receiving Outpatient, Exposure-Based Cognitive Behavioral Therapy

Important dates

Study start
2026
Primary completion
2027
Study completion
2027
First posted
Jun 24, 2026
Registry last updated
Jun 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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