Deze pagina is automatisch vertaald en de nauwkeurigheid van de vertaling kan niet worden gegarandeerd. Raadpleeg de Engelse versie voor een brontekst.

Acceptance and Commitment Therapy on Psychological Flexibility, Values, and Well-Being: A Single-Case Experimental Study (ACT-UNIVALLE)

26 mei 2026 bijgewerkt door: Universidad del Valle, Colombia

Acceptance and Commitment Therapy on Psychological Flexibility, Values, and Well-Being

The goal of this clinical trial is to evaluate the effects of a brief Acceptance and Commitment Therapy (ACT)-based group intervention on psychological flexibility, values-based functioning, and psychological well-being in university students aged 18 to 28 years presenting elevated levels of emotional distress and psychological risk indicators.

The main questions it aims to answer are:

Does a brief ACT-based intervention reduce experiential avoidance and cognitive fusion in university students? Does the intervention improve present-moment awareness, values-based functioning, life satisfaction, and psychological flourishing?

Participants will:

Complete repeated self-report assessments across 13 measurement points distributed throughout baseline, intervention, and follow-up phases.

Participate in five weekly ACT-based group intervention sessions delivered by trained clinical psychologists.

Engage in experiential ACT exercises focused on acceptance, mindfulness, cognitive defusion, values clarification, and committed action.

Complete between-session activities and behavioral practices related to the ACT processes addressed during the intervention.

Participate in follow-up assessments to evaluate maintenance of treatment effects over time.

Studie Overzicht

Toestand

Voltooid

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

University students frequently experience elevated levels of emotional distress, including symptoms of anxiety, depression, stress, worry, and psychological maladjustment. Brief interventions based on Acceptance and Commitment Therapy (ACT) have shown promising results in reducing experiential avoidance and cognitive fusion while promoting psychological flexibility and well-being.

The present study evaluates the effects of a brief ACT-based intervention protocol delivered in a group format using a Single-Case Experimental Design (SCED) with repeated measurements across baseline, intervention, and follow-up phases. The intervention focuses on core ACT processes, including acceptance, cognitive defusion, present-moment awareness, values clarification, and committed action.

Participants completed repeated assessments of psychological flexibility processes and well-being indicators across thirteen measurement points distributed throughout the study phases. The investigators hypothesize that the ACT-based intervention will produce reductions in experiential avoidance and cognitive fusion, together with improvements in present-moment awareness, values-based functioning, life satisfaction, and flourishing.

Studietype

Ingrijpend

Inschrijving (Werkelijk)

12

Fase

  • Niet toepasbaar

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studie Locaties

  • Colombia
    • Valle del Cauca Department
      • Cali, Valle del Cauca Department, Colombia, 760032
        • Faculty of Psychology, Universidad del Valle

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen

Accepteert gezonde vrijwilligers

Ja

Beschrijving

Inclusion Criteria:

University students aged 18 years or older Interest in strengthening mental health and psychological well-being Voluntary agreement to participate in the study

High-risk scores on at least one of the following screening instruments:

Depression Anxiety Stress Scales (DASS-21) General Health Questionnaire (GHQ-12) State Worry Questionnaire-11 (SWQ-11)

Exclusion Criteria:

Current psychological or psychiatric treatment Current use of psychiatric medication Diagnosis related to developmental or learning difficulties Failure to attend intervention sessions Incomplete participation in study assessments

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: NVT
  • Interventioneel model: Opdracht voor een enkele groep
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: ACT-Based Brief Group Intervention
The intervention consisted of a brief ACT-based group protocol delivered weekly by trained clinical psychologists. The protocol targeted core ACT processes including acceptance, cognitive defusion, present-moment awareness, values clarification, and committed action. Sessions incorporated experiential exercises, metaphors, mindfulness practices, reflective activities, and between-session behavioral tasks designed to promote psychological flexibility and psychological well-being in university students.
Gedragsmatig: Acceptance and Commitment Therapy (ACT)-Based Brief Group Intervention

The intervention consisted of a brief group-based Acceptance and Commitment Therapy (ACT) protocol designed to promote psychological flexibility and psychological well-being in university students presenting elevated emotional distress and psychological risk indicators. The protocol was grounded in the functional contextual approach and targeted core ACT processes, including acceptance, cognitive defusion, present-moment awareness, values clarification, and committed action.

Participants were organized into small groups of 5 to 8 individuals and attended five weekly intervention sessions conducted by trained clinical psychologists with at least five years of clinical experience. Prior to implementation, therapists completed specialized ACT training delivered by an expert clinician with extensive experience in Acceptance and Commitment Therapy.

The intervention protocol included an initial preliminary session focused on motivational engagement, informed consent procedures, feedback rega

Andere namen:
  • ACT Brief
  • ACT Protocol Group
  • ACT Intervention

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Mindful Attention Awareness Scale (MAAS)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks
The Mindful Attention Awareness Scale (MAAS) is a 15-item self-report questionnaire designed to assess present-moment attention and awareness in daily life. Items are rated on a 6-point Likert-type scale ranging from 1 ("almost always") to 6 ("almost never"). Total scores are calculated by summing item responses, with higher scores indicating greater mindfulness and present-moment awareness.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks
Acceptance and Action Questionnaire-II (AAQ-II)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
The Acceptance and Action Questionnaire-II (AAQ-II) is a 7-item self-report questionnaire designed to assess experiential avoidance and psychological inflexibility. Items are rated on a 7-point Likert-type scale ranging from 1 ("never true") to 7 ("always true"). Total scores are calculated by summing item responses, with higher scores indicating greater experiential avoidance and psychological inflexibility.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
Cognitive Fusion Questionnaire (CFQ)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
The Cognitive Fusion Questionnaire (CFQ) is a 7-item self-report questionnaire designed to assess cognitive fusion. Items are rated on a 7-point Likert-type scale ranging from 1 ("never true") to 7 ("always true"). Total scores are calculated by summing item responses, with higher scores indicating greater cognitive fusion.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Valuing Questionnaire - Obstruction Subscale (VQ-Obstruction)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
The Valuing Questionnaire - Obstruction Subscale (VQ-Obstruction) is a 5-item self-report measure designed to assess barriers and interference with values-based living. Items are rated on a 7-point Likert-type scale ranging from 0 ("not at all true") to 6 ("completely true"). Higher scores indicate greater obstruction in valued living.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
Satisfaction With Life Scale (SWLS)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
The Satisfaction With Life Scale (SWLS) is a 5-item self-report questionnaire designed to assess global life satisfaction. Items are rated on a 7-point Likert-type scale ranging from 1 ("strongly disagree") to 7 ("strongly agree"). Total scores are calculated by summing item responses, with higher scores indicating greater life satisfaction.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
Flourishing Scale (FS)
Tijdsspanne: Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.
The Flourishing Scale (FS) is an 8-item self-report questionnaire designed to assess psychological flourishing, including meaning in life, interpersonal relationships, competence, and optimism. Items are rated on a 7-point Likert-type scale ranging from 1 ("strongly disagree") to 7 ("strongly agree"). Total scores are calculated by summing item responses, with higher scores indicating greater psychological flourishing.
Weekly during baseline (4 weeks), intervention (6 weeks), and follow-up (3 weeks), up to 13 weeks.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Universidad del Valle, Colombia

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

1 april 2025

Primaire voltooiing (Werkelijk)

15 juni 2025

Studie voltooiing (Werkelijk)

30 juni 2025

Studieregistratiedata

Eerst ingediend

12 mei 2026

Eerst ingediend dat voldeed aan de QC-criteria

26 mei 2026

Eerst geplaatst (Werkelijk)

2 juni 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

2 juni 2026

Laatste update ingediend die voldeed aan QC-criteria

26 mei 2026

Laatst geverifieerd

1 mei 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • Universidad del Valle
  • UNIVALLE-ACT-2025 (Andere identificatie: Faculty of Psychology, Universidad del Valle)
  • Faculty of Psychology (Andere identificatie: Faculty of Psychology, Universidad del Valle)

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

Deze informatie is zonder wijzigingen rechtstreeks van de website clinicaltrials.gov gehaald. Als u verzoeken heeft om uw onderzoeksgegevens te wijzigen, te verwijderen of bij te werken, neem dan contact op met register@clinicaltrials.gov. Zodra er een wijziging wordt doorgevoerd op clinicaltrials.gov, wordt deze ook automatisch bijgewerkt op onze website .

Abonneren