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The aim of this study is to evaluate the efficacy of virtual reality exposure therapy (VRET) as a treatment for obsessive-compulsive disorder (OCD). This study focuses on patients receiving treatment in outpatient psychiatry or clinical psychology settings, utilizing a within-subject design for comparison. Patients first complete informed consent and baseline questionnaires and are placed on a waiting list for five weeks. After this period, they are reassigned to the active (experimental) group, which will receive five sessions of exposure therapy in virtual reality over a subsequent five-week period. The treatment effect will be evaluated using pre/post assessments, as well as monitoring adherence to exposure and response prevention assignments.
The virtual environment of so called "OCD house" is used as a tool for the therapy. Immersive VR glasses Meta Quest 2 are used to visualize the environment.
During exposure therapy, relevant virtual stimuli can be freely combined involving common objects and situations in the home that may trigger OCD symptoms and hoarding. Target stimuli (VR elements) are divided into several sets corresponding to OCD subtypes. During the session, the therapist can modify the level of difficulty via four standardized levels according to the individual needs of clients.
The therapeutic application enables direct interaction with stimuli in the environment of the virtual house and garden, thanks to hand tracking. The hand tracking and hand gestures are used also to control the movement in the environment by the patients, but direct head and body rotations and small movements are enabled by the VR headset. The psychotherapist can follow the patient actions and control the settings of the environment (e.g.selection of relevant stimuli, level of difficulty) using a streaming app on the tablet or a mobile phone and advise the patient where necessary. The level of difficulty is gradually increased during the progress of the therapy.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Within-subject comparison of a waiting list condition with exposure therapy in VR | Experimental | Patients first complete informed consent and baseline questionnaires and are placed on a waiting list for five weeks. After this period, they are reassigned to the active group, which receives five sessions of exposure therapy in virtual reality over a subsequent five-week period. The treatment effect will be evaluated using pre/post assessments, as well as monitoring adherence to exposure and response prevention assignments. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| exposure therapy in virtual reality | Behavioral | Participants complete five 30-40-minute sessions of exposure therapy administered via a virtual reality headset once a week. The exposure involves exposure to various symptom-provoking scenarios in the virtual house environment. Scenarios can be adjusted to distinct OCD dimensions: contamination/cleaning, fear-of-harm/checking symmetry/ordering, and also to symptoms of hoarding. Stimuli can be also freely combined across different dimensions, so that the scenarios fit the individual needs. |
| Measure | Description | Time Frame |
|---|---|---|
| The Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) self report version | The Y-BOCS is a 19-item scale assessing the severity of obsessive-compulsive symptoms. Raw score range from 0 to 40, where 0 = no symptoms and 40 = very severe symptoms with highly impaired daily functioning. | Applied repeatedly: 1) Before the assignment to the waitlist condition, 2) After the waitlist period = Before the start of the first VRET therapy session, 3) After the last VRET session and 4) Follow-up 3 months after the last therapy session. |
| The Beck Depression Inventory | The Beck Depression Inventory (BDI) is a 21-item, self-report rating inventory that measures characteristic attitudes and symptoms of depression. | Applied repeatedly: 1) Before the assignment to the waitlist condition, 2) After the waitlist period = Before the start of the first VRET therapy session, 3) After the last VRET session and 4) Follow-up 3 months after the last therapy session. |
| Beck Anxiety Inventory (BAI) | BAI is an inventory of anxiety symptoms with 18 items rated on a 5-point Likert scale (0-4). Score range from 0 to 72, with higher scores indicating more severe anxiety symptoms. | Applied repeatedly: 1) Before the assignment to the waitlist condition, 2) After the waitlist period = Before the start of the first VRET therapy session, 3) After the last VRET session and 4) Follow-up 3 months after the last therapy session. |
| Hierarchy of fears | Patients describe and rate their most feared situations or stimuli on a 10-point scale (1-10). | Applied repeatedly: 1) Before the assignment to the waitlist condition, 2) After the waitlist period = Before the start of the first VRET therapy session, 3) After the last VRET session and 4) Follow-up 3 months after the last therapy session. |
| The Spielberger State-Trait Anxiety Inventory-X2 (STAI-X2) |
| Measure | Description | Time Frame |
|---|---|---|
| Subjective Units of Distress Scale (SUDS) | The SUDS is a visual analog scale in which the participant rates his/her anxiety/discomfort based on a range between 1 (no anxiety/discomfort) and 10 (very severe anxiety/discomfort). | During In-Sessions: week 1-5 of experimental VRET condition |
| Adherence to exposures |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Iveta Hocko Fajnerová | Contact | +420608501034 | iveta.fajnerova@nudz.cz | |
| Pavla Stopková | Contact | pavla.stopkova@nudz.cz |
| Name | Affiliation | Role |
|---|---|---|
| Iveta Hocko Fajnerová, Ph.D. | National Institute of Mental Health (NIMH) | Study Director |
| Pavla Stopková, Ph.D. | National Institute of Mental Health (NIMH) | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Nationa Institute of Mental Health | Recruiting | Klecany | Česká Republika | 250 67 | Czechia |
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| Label | URL |
|---|---|
| Description and illustration images of the software used in the study. | View source |
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IPD used in the publication of results
After the publication of study data.
The anonymized preprocessed behavioral data will be shared using an institutional open access or journal repository. Additional raw data access requests will be reviewed using an online form. Requestors will be required to sign a data access agreement.
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| ID | Term |
|---|---|
| D009771 | Obsessive-Compulsive Disorder |
| ID | Term |
|---|---|
| D001008 | Anxiety Disorders |
| D001523 | Mental Disorders |
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| ID | Term |
|---|---|
| D007171 | Implosive Therapy |
| D014850 | Waiting Lists |
| ID | Term |
|---|---|
| D003887 | Desensitization, Psychologic |
| D001521 | Behavior Therapy |
| D011613 | Psychotherapy |
| D004191 | Behavioral Disciplines and Activities |
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Within-subject design. Waiting list period followed by active treatment period of the same length (5 weeks).
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| Wait list | Other | The patients are assigned to a waitlist period for 5 weeks. During this period they are not allowed to change any treatment (phramacotherapy and/or psychoterapy as usual) started prior to the trial. |
|
The Spielberger State-Trait Anxiety Inventory-X2 (STAI-X2) is used to measure self-reported symptoms of trait anxiety with higher score indicating higher anxiety levels (score range 20-80). |
| Applied repeatedly: 1) Before the assignment to the waitlist, 2) After the waitlist period = Before the start of the first VRET therapy session, 3) After the last VRET session and 4) Follow-up 3 months after the last therapy session |
Four questions aimed at gathering information about how patients managed to perform exposures during the past week and to what extent the skills acquired during the VR exposure therapy were useful. |
| Before In-Sessions: week 1-5 of experimental VRET condition |
| The Igroup Presence Questionnaire (IPQ) | The scale includes 3 subscales SP (spatial presence), INV (involvement) and REAL (experienced realism) with score range 0-7. Higher scores indication higher sense of presence. This measure might be positivelly associated with positive outcome. | Immediately after the first session of VR exposure therapy. |
| Simulator Sickness Questionnaire (SSQ) | The scale evaluates cybersickness symptoms in three subscales: nausea (N), oculomotor disturbance (O), disorientation (D). Total simulator sickness raw score 0-48 (adjusted total score 0-180). Higher scores on each scale indicatestronger perceptions of the underlying sickness symptoms and aretherefore undesired. This measure might be negatively associated with positive outcome and sense of presence. | Immediately after the first session of VR exposure therapy. |
| D001071 | Appointments and Schedules |
| D009934 | Organization and Administration |
| D006298 | Health Services Administration |