tDCS-Augmented Exposure Therapy for Pathological Fear
Studieöversikt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Detaljerad beskrivning
Studietyp
Studietyp
Inskrivning (Faktisk)
Inskrivning
Fas
Fas
- Inte tillämpbar
Kontakter och platser
Studieorter
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Texas
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Austin, Texas, Förenta staterna, 78712
- Laboratory for the Study of Anxiety Disorders
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Deltagandekriterier
Urvalskriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
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.
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Behandling
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Fyrdubbla
Antal vapen
Vapen och interventioner
Deltagargrupp / ArmDeltagargrupp / Arm |
Intervention / BehandlingIntervention / Behandling |
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Aktiv komparator: 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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Sham Comparator: 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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Vad mäter studien?
Primära resultatmått
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Change in peak fear during two behavioral approach tasks across time-points.
Tidsram: 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.
Tidsram: 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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Sekundära resultatmått
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
|---|---|---|
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Change in arachnophobia symptom severity across time-points
Tidsram: 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
Tidsram: 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.
Tidsram: 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
Tidsram: 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
Tidsram: 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
Tidsram: 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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Samarbetspartners och utredare
Sponsor
Sponsor
Utredare
Utredare
- Huvudutredare: Adam R. Cobb, Ph.D., The University of Texas at Austin
- Studierektor: Michael J. Telch, PhD, The University of Texas at Austin
Publikationer och användbara länkar
Användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Studiestart
Primärt slutförande (Faktisk)
Primärt slutförande
Avslutad studie (Faktisk)
Avslutad studie
Studieregistreringsdatum
Först inskickad
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Första postat
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste uppdatering publicerad
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
Andra studie-ID-nummer
- 2016-02-0024
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