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An international study of therapist-supported online cognitive behavioural therapy for the reduction of repetitive negative thought (overthinking, rumination, worry) in adults: the Calming Minds study

An international randomised factorial trial of therapist-supported online cognitive behavioural therapy for the reduction of repetitive negative thought (overthinking, rumination, worry) in adults: the Calming Minds study

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN10569526
Enrollment
2192
Registered
2026-01-06
Start date
2026-04-16
Completion date
Unknown
Last updated
2026-07-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Repetitive negative thought (overthinking, rumination, worry) Mental and Behavioural Disorders

Interventions

If the participant has completed their baseline questionnaires and 60% of the mPath prompt questions within the specified time limits, they will proceed to be automatically randomised via the study da

Sponsors

University of Exeter
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 100 Years

Inclusion criteria

Inclusion criteria: Participants must satisfy ALL of the following criteria to be enrolled in the study, and will be excluded in sequence if an individual does not meet a criterion during screening (to minimise participant burden): 1. Lives in UK or USA 2. Aged 18 years and over 3. Access to a suitable smartphone/device to use the m-Path app and MyDataHelps intervention (i.e. MyDataHelps requires iOS 16.4 or later. iOS 16.4 is compatible with all iPhone models starting from the iPhone 8 and later. For Android devices, MyDataHelps requires Android version 8.0 or higher.) 4. Elevated RNT based on the following assessment scores – scoring in top quartile in one and in top tercile for the other based on prior studies: 4.1. RRS brooding score above 12 (top quartile) and PSWQ-short form score above 24 (top tercile) OR 4.2. RRS brooding score above 11 (top tercile) and PSQW-short form score above 26 (top quartile)

Exclusion criteria

Exclusion criteria: Participants who self-report meeting ANY of the following criteria at time of recruitment will be excluded from study participation: 1. Concurrent psychotherapy 2. Current self-reported diagnosis of any of the following conditions, including receiving or waiting for treatment: 2.1. Alcohol abuse/dependence 2.2. Substance abuse/dependence 3. Self-reported diagnosis of current or history of bipolar disorder or psychosis at any time 4. Taking antidepressants or anxiolytic medications at a stable dose for less than six weeks 5. Severe post-traumatic stress disorder (PTSD, assessed as a score of 17 or higher in total for the first six questions AND a score of 2 or higher on the seventh question of the adapted International Trauma Questionnaire; ITQ) 6. Suicidal thoughts* and self-harm assessed by a combination of PHQ-9 question 9 score of 1 or higher and a yes to question R1a and/or R1B, and a yes to either question R2 and/or R3 (detailed below): R1a = In the last 2 weeks have you been experiencing regular thoughts about suicide? R1b = In the last 2 weeks have you been experiencing regular thoughts about self-harm? R2 = In the last 2 weeks have you had any intention to hurt or kill yourself? R3 = In the last 2 weeks have you made any plans to harm yourself or end your life?

Design outcomes

Primary

MeasureTime frame
RNT as indexed by the Perseverative Thinking Questionnaire from baseline to post-treatment (16 weeks)

Secondary

MeasureTime frame
The following secondary outcomes will be measured using standardised validated measures at baseline, and post- treatment at 16 weeks and 52 weeks post-randomisation via participant survey on REDCap: 1. Anxiety measured with General Anxiety Disorder-7 (GAD-7) 2. Depression measured with Patient Health Questionnaire-9 (PHQ-9) 3. Mental wellbeing measured with Warwick-Edinburgh Mental Wellbeing Scale Short-form (WEMWBS) 4. Levels of rumination measured with RRS-Brooding subscale 5. Levels of worry measured with Penn State Worry Questionnaire –short-form (PSWQ) 6. Social functioning measured with Work and Social Adjustment Scale (WSAS) The following secondary outcome will only be measured at baseline and at 16 weeks post-randomisation (captured by the mPath app): 7. Repetitive negative thought (RNT) in everyday life measured with EMA (aggregate person-level ratings of RNT across 10 day period; variability of RNT; relationship of RNT to mood state & contextual events; automaticity of RNT, based on EMA items) We will also assess incidence of major depressive episodes and generalized anxiety disorder across the 12-month follow-up using standardized structured online measures (adapted lifetime history of depression and anxiety disorders (LIDAS) for depression, adapted GAD for anxiety), enabling us to test which factors have long-term effects on RNT and on the prevention of first incidence or recurrence of episodes of depression and anxiety, providing direct data to inform transformation of early interventions.

Countries

England, United Kingdom, United States of America

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Jul 23, 2026