Actively Recruiting
Behavioral Activation for Depression and Habitual Rumination
Led by Ragnar Pétur Ólafsson · Updated on 2026-01-12
120
Participants Needed
1
Research Sites
155 weeks
Total Duration
On this page
Sponsors
R
Ragnar Pétur Ólafsson
Lead Sponsor
T
The Icelandic Centre for Research
Collaborating Sponsor
AI-Summary
What this Trial Is About
Depressive rumination, a negative thinking style characterized by repetitive and passive thoughts about the causes, meanings, and consequences of one's feelings and distress, is often described as being a habitual response tendency that forms a vulnerability to depression. Behavioural Activation (BA) is an effective treatment for depression but little is known of mechanisms of changes during a successful treatment completion and for whom the treatment benefits the most. The main purpose of the study is to investigate whether habit-like mood-reactive rumination will change during Behavioral Activation treatment for current depression and mediates symptom changes in the treatment. Important moderators of change will also be investigated (i.e. history of early life stress and cognitive flexibility). We aim to provide individual BA treatment for up to 120 currently depressed participants (from 90 to 120 participants) in 12 treatment sessions over 11 weeks. Measures are obtained at pre-treatment, during treatment, at post-treatment and at 6 month follow up.
CONDITIONS
Official Title
Behavioral Activation for Depression and Habitual Rumination
Who Can Participate
Eligibility Criteria
You may qualify if you...
- Current major depressive episode diagnosed by DIAMOND interview as the primary diagnosis
- Score of 14 or higher on Becks Depression Inventory-II for depressive symptoms in past 2 weeks
- Age between 18 and 65 years at study start
- Good understanding of Icelandic language to complete study measures
- Completion of pre-treatment assessment including 2 researcher visits and 6-day ecological momentary assessment
You will not qualify if you...
- Current or past manic or hypomanic episodes diagnosed by DIAMOND interview
- Current or past psychotic disorders diagnosed by DIAMOND interview
- Substance abuse within the last 12 months diagnosed by DIAMOND interview
- Active and serious suicidal thoughts or suicide attempt in the past 2 months
- Unstable depression medication treatment in past 2 months before pre-treatment assessment
- Recent psychotherapy in past month or ongoing psychotherapy during study
- Cognitive impairments or severe physical illness
AI-Screening
AI-Powered Screening
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Trial Site Locations
Total: 1 location
1
University of Iceland
Reykjavik, Iceland, Iceland, 102
Actively Recruiting
Research Team
R
Ragnar P Ólafsson, PhD
CONTACT
S
Sigurður Viðar, Cand.Psych
CONTACT
How is the study designed?
Study Type
INTERVENTIONAL
Masking
NONE
Allocation
NA
Model
SINGLE_GROUP
Primary Purpose
TREATMENT
Number of Arms
1
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