tDCS-Augmented Exposure Therapy for Pathological Fear
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Descripción detallada
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Fase
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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Texas
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Austin, Texas, Estados Unidos, 78712
- Laboratory for the Study of Anxiety Disorders
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Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
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 de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Tratamiento
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Cuadruplicar
Número de brazos
Armas e Intervenciones
Grupo de participantes/brazoGrupo de participantes/brazo |
Intervención / TratamientoIntervención / Tratamiento |
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Comparador activo: 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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Comparador falso: 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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¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Change in peak fear during two behavioral approach tasks across time-points.
Periodo de tiempo: 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.
Periodo de tiempo: 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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Medidas de resultado secundarias
Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Change in arachnophobia symptom severity across time-points
Periodo de tiempo: 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
Periodo de tiempo: 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.
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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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Colaboradores e Investigadores
Patrocinador
Patrocinador
Investigadores
Investigadores
- Investigador principal: Adam R. Cobb, Ph.D., The University of Texas at Austin
- Director de estudio: Michael J. Telch, PhD, The University of Texas at Austin
Publicaciones y enlaces útiles
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Otros números de identificación del estudio
Otros números de identificación del estudio
- 2016-02-0024
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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