protocolSection identificationModule nctId: NCT06311136, orgStudyIdInfo id: PEAK, briefTitle: Effectiveness of an Ecological Momentary Emotion Regulation Intervention, statusModule overallStatus: RECRUITING, startDateStruct date: 2024-01-12, primaryCompletionDateStruct date: 2024-12, completionDateStruct date: 2024-12, studyFirstPostDateStruct date: 2024-03-15, lastUpdatePostDateStruct date: 2024-03-18, sponsorCollaboratorsModule leadSponsor name: Heidelberg University, class: OTHER, descriptionModule briefSummary: This two-armed randomized controlled trial aims to investigate the effectiveness of an emotion regulation intervention in individuals with and without depressive disorders. The study encompasses participants diagnosed with mild to moderate major depression or persistent depressive disorder and healthy controls without a current depressive disorder.Participants will be randomly assigned to either the intervention group, receiving a valence-specific emotion regulation intervention in daily life, or a monitoring-only control group. The valence-specific intervention supports the implementation of different emotion regulation strategies based on whether a person is experiencing mainly positive or negative emotions. In contrast, participants in the control group will solely monitor their positive and negative emotions and the strategies used to regulate them.Outcome measures include emotion regulation ability, self-efficacy, and strategy use, depressive symptoms, positive and negative affect, and emotion beliefs (controllability, usefulness).A second aim of the study is to compare beliefs about positive emotions and strategies to regulate them between individuals with and without current depressive disorders. Furthermore, the investigators aim to examine why individuals might choose unfavorable emotion regulation strategies even when feeling good. Therefore, another research question is, how emotion beliefs might explain emotion regulation strategy choice., conditionsModule conditions: Depressive Disorder, Major, conditions: Persistent Depressive Disorder, conditions: Healthy, designModule studyType: INTERVENTIONAL, phases: NA, designInfo allocation: RANDOMIZED, interventionModel: PARALLEL, interventionModelDescription: Randomized Controlled Trial with an Intervention Group and a Control Group without an intervention., primaryPurpose: TREATMENT, maskingInfo masking: DOUBLE, maskingDescription: During the treatment phase, both the intervention and monitoring-only control groups use a diary called "Positive Everyday Affect Knowledge". Participants are informed that the diary entries may include instructions for implementing specific emotion regulation strategies in their daily activities. However, this component of the procedure is not characterized explicitly as an intervention. This methodological consideration ensures that differences observed between the groups can be attributed to the intervention itself, rather than to differences in participants' expectations.Clinical interviews will be conducted blindly., whoMasked: PARTICIPANT, whoMasked: OUTCOMES_ASSESSOR, enrollmentInfo count: 200, type: ESTIMATED, armsInterventionsModule interventions name: Valence-Specific Ecological Momentary Intervention, outcomesModule primaryOutcomes measure: Emotion Regulation Ability (Positive, Negative Emotions), primaryOutcomes measure: Emotion Regulation Self-Efficacy for Positive and Negative Emotions, secondaryOutcomes measure: Emotion Regulation Strategy Use in Positive and Negative Emotional Contexts, secondaryOutcomes measure: Depressive Symptoms, secondaryOutcomes measure: Positive and Negative Affect, secondaryOutcomes measure: Emotion Beliefs (Controllability, Usefulness) about Positive and Negative Emotions, otherOutcomes measure: Well-being, otherOutcomes measure: Life Satisfaction, otherOutcomes measure: Emotion Beliefs about Positive Emotions (Delay Happiness, Living in the Moment), otherOutcomes measure: Emotion Beliefs about Positive Emotions (Fear of Happiness), otherOutcomes measure: Negative Emotional Contrast Avoidance, otherOutcomes measure: Emotion Regulation Strategy Use, otherOutcomes measure: Self-Esteem, otherOutcomes measure: Locus of Control, otherOutcomes measure: Controllability Beliefs about Emotions, otherOutcomes measure: Anxiety Symptoms, eligibilityModule sex: ALL, minimumAge: 18 Years, maximumAge: 65 Years, stdAges: ADULT, stdAges: OLDER_ADULT, contactsLocationsModule locations facility: Department of Clinical Psychology and Psychotherapy, Institute of Psychology, Heidelberg University, status: RECRUITING, city: Heidelberg, zip: 69117, country: Germany, contacts name: Ilka Mueller, M.Sc., role: CONTACT, phone: +496221/547362, email: ilka.mueller@psychologie.uni-heidelberg.de, contacts name: Luise Pruessner, M.Sc., role: CONTACT, phone: +496221/547282, email: luise.pruessner@psychologie.uni-heidelberg.de, geoPoint lat: 49.40768, lon: 8.69079, hasResults: False