tDCS-Augmented Exposure Therapy for Pathological Fear
Aperçu de l'étude
Statut
Statut
Les conditions
Les conditions
Intervention / Traitement
Intervention / Traitement
Description détaillée
Type d'étude
Type d'étude
Inscription (Réel)
Inscription
Phase
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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Texas
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Austin, Texas, États-Unis, 78712
- Laboratory for the Study of Anxiety Disorders
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Critères de participation
Critère d'éligibilité
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Age 18-65.
- Fluent in English.
- A score on at least 1 fear domain-specific prescreen measure > 2 SDs above the subject pool prescreen mean. These measures include (a) FSQ, and (b) OCI-R.
- Peak fear ≥ 50 on BATs 1 and 2.
Exclusion Criteria:
- Currently receiving treatment for the primary fear domain (based on clinical interview).
- Unstable dose of psychotropic medications within 6 weeks prior to baseline assessment (based on the DMQ; see measures).
- Medical condition that would contraindicate participation in treatment or assessment activities (e.g., cardiovascular problems; based on the DMQ; see measures).
- Pregnancy (based on the DMQ; see measures).
- Current major depressive disorder (based on MINI; see measures).
- Current, or history of bipolar disorder (based on MINI; see measures).
- Current, or history of psychotic symptoms (based on MINI; see measures).
- Serious suicidal risk, as determined by self-report (C-SSRS, BDI-II) and clinical interview (MINI; see measures).
- Active neurological conditions, including seizures, stroke, unexplained loss of consciousness or concussion (based on DMQ and tDCS Safety Screening Form; see measures)
- Contraindications for tDCS: Metal in the head or implanted brain medical devices.
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Traitement
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Quadruple
Nombre de bras
Armes et Interventions
Groupe de participants / BrasGroupe de participants / Bras |
Intervention / TraitementIntervention / Traitement |
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Comparateur actif: Active tDCS + In Vivo Exposure
Participants assigned to this condition will receive excitatory transcranial direct current stimulation (tDCS) of the left medial prefrontal cortex (lmPFC) and inhibitory tDCS of right dorsolateral prefrontal cortex (rdlPFC).
tDCS will be administered for 20 minutes at 1.7 mA, followed by 30 minutes of in vivo exposure therapy.
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Participants will receive 20 minutes of either active or sham tDCS prior to in vivo exposure to feared targets.
Participants will receive 30 minutes of in vivo exposure to feared targets following either active or sham tDCS
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Comparateur factice: sham tDCS + In Vivo Exposure
Participants assigned to this condition will receive sham transcranial direct current stimulation (tDCS), which will consist of 30 seconds of stimulation at the beginning and end of tDCS administration.
Electrode positioning will be counterbalanced across participants (i.e., either mPFC+ or mPFC-, with same electrode positioning as the active comparators).
Sham tDCS will be administered for 20 minutes, followed by 30 minutes of in vivo exposure therapy.
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Participants will receive 30 minutes of in vivo exposure to feared targets following either active or sham tDCS
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Que mesure l'étude ?
Principaux critères de jugement
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Change in peak fear during two behavioral approach tasks across time-points.
Délai: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Subjective units of distress from 0 = no fear, to 100 = extreme fear
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Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Change in approach level during two behavioral approach tasks across time points.
Délai: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Highest difficulty level achieved from 0 = least challenging to 10 = most challenging.
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Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Mesures de résultats secondaires
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Change in arachnophobia symptom severity across time-points
Délai: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Total score on the Fear of Spiders Questionnaire
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Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Change in ophidophobia symptom severity across time-points
Délai: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Total score on the Fear of Snakes Questionnaire
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Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Change in germaphobia / contamination fear symptom severity across time points.
Délai: Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Total score on the Obsessive Compulsive Inventory - Revised.
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Pre-treatment (baseline), post-treatment (1 week later), and follow-up (1 month after treatment)
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Threat vigilance task
Délai: Before and after tDCS administration (1 week after baseline)
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Computer-based task that assesses attention biases towards and away from threatening images.
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Before and after tDCS administration (1 week after baseline)
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Visuospatial working memory task
Délai: Before and after tDCS administration (1 week after baseline)
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Delayed match to sample task assessing recognition of 4 x 4 arrays of colored blocks, after a brief delay.
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Before and after tDCS administration (1 week after baseline)
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Incidental contextual memory task
Délai: Stimulus presented during in vivo exposure (1 week after baseline), and memory assessed at follow-up (1 month after treatment)
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Assessment of incidental memory for a 4 x 4 array of line drawings from the Test of Memory Malingering, presented in the treatment context only during in vivo exposure.
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Stimulus presented during in vivo exposure (1 week after baseline), and memory assessed at follow-up (1 month after treatment)
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Collaborateurs et enquêteurs
Parrainer
Parrainer
Les enquêteurs
Les enquêteurs
- Chercheur principal: Adam R. Cobb, Ph.D., The University of Texas at Austin
- Directeur d'études: Michael J. Telch, PhD, The University of Texas at Austin
Publications et liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Début de l'étude
Achèvement primaire (Réel)
Achèvement primaire
Achèvement de l'étude (Réel)
Achèvement de l'étude
Dates d'inscription aux études
Première soumission
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Première publication
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour publiée
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Dernière vérification
Plus d'information
Termes liés à cette étude
Mots clés
Autres numéros d'identification d'étude
Autres numéros d'identification d'étude
- 2016-02-0024
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Informations sur les médicaments et les dispositifs, documents d'étude
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