tDCS-Augmented Exposure Therapy for Pathological Fear
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Detaillierte Beschreibung
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Phase
Phase
- Unzutreffend
Kontakte und Standorte
Studienorte
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Texas
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Austin, Texas, Vereinigte Staaten, 78712
- Laboratory for the Study of Anxiety Disorders
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Beschreibung
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.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Behandlung
- Zuteilung: Zufällig
- Interventionsmodell: Parallele Zuordnung
- Maskierung: Vervierfachen
Anzahl der Arme
Waffen und Interventionen
Teilnehmergruppe / ArmTeilnehmergruppe / Arm |
Intervention / BehandlungIntervention / Behandlung |
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Aktiver 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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Schein-Komparator: 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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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Change in peak fear during two behavioral approach tasks across time-points.
Zeitfenster: 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.
Zeitfenster: 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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Sekundäre Ergebnismessungen
Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
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Change in arachnophobia symptom severity across time-points
Zeitfenster: 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
Zeitfenster: 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.
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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
Zeitfenster: 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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Mitarbeiter und Ermittler
Sponsor
Sponsor
Ermittler
Ermittler
- Hauptermittler: Adam R. Cobb, Ph.D., The University of Texas at Austin
- Studienleiter: Michael J. Telch, PhD, The University of Texas at Austin
Publikationen und hilfreiche Links
Nützliche Links
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Tatsächlich)
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Tatsächlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 2016-02-0024
Plan für individuelle Teilnehmerdaten (IPD)
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Arzneimittel- und Geräteinformationen, Studienunterlagen
Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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