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

26 maggio 2026 aggiornato da: 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.

Panoramica dello studio

Stato

Completato

Condizioni

Intervento / Trattamento

Descrizione dettagliata

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.

Tipo di studio

Interventistico

Iscrizione (Effettivo)

12

Fase

  • Non applicabile

Contatti e Sedi

Questa sezione fornisce i recapiti di coloro che conducono lo studio e informazioni su dove viene condotto lo studio.

Luoghi di studio

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

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto

Accetta volontari sani

Sì

Descrizione

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

Piano di studio

Questa sezione fornisce i dettagli del piano di studio, compreso il modo in cui lo studio è progettato e ciò che lo studio sta misurando.

Come è strutturato lo studio?

Dettagli di progettazione

  • Scopo principale: Trattamento
  • Assegnazione: N / A
  • Modello interventistico: Assegnazione di gruppo singolo
  • Mascheramento: Nessuno (etichetta aperta)

Armi e interventi

Gruppo di partecipanti / Arm
Intervento / Trattamento
Sperimentale: 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.
Comportamentale: 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

Altri nomi:
  • ACT Brief
  • ACT Protocol Group
  • ACT Intervention

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Mindful Attention Awareness Scale (MAAS)
Lasso di tempo: 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)
Lasso di tempo: 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)
Lasso di tempo: 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.

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Valuing Questionnaire - Obstruction Subscale (VQ-Obstruction)
Lasso di tempo: 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)
Lasso di tempo: 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)
Lasso di tempo: 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.

Collaboratori e investigatori

Qui è dove troverai le persone e le organizzazioni coinvolte in questo studio.

Sponsor

Universidad del Valle, Colombia

Studiare le date dei record

Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

1 aprile 2025

Completamento primario (Effettivo)

15 giugno 2025

Completamento dello studio (Effettivo)

30 giugno 2025

Date di iscrizione allo studio

Primo inviato

12 maggio 2026

Primo inviato che soddisfa i criteri di controllo qualità

26 maggio 2026

Primo Inserito (Effettivo)

2 giugno 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

2 giugno 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

26 maggio 2026

Ultimo verificato

1 maggio 2026

Maggiori informazioni

Termini relativi a questo studio

Parole chiave

Termini MeSH pertinenti aggiuntivi

Altri numeri di identificazione dello studio

  • Universidad del Valle
  • UNIVALLE-ACT-2025 (Altro identificatore: Faculty of Psychology, Universidad del Valle)
  • Faculty of Psychology (Altro identificatore: Faculty of Psychology, Universidad del Valle)

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .

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