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Trial registered on ANZCTR
Registration number
ACTRN12624000881538p
Ethics application status
Submitted, not yet approved
Date submitted
18/06/2024
Date registered
19/07/2024
Date last updated
6/09/2024
Date data sharing statement initially provided
19/07/2024
Type of registration
Prospectively registered
Titles & IDs
Public title
Designing and piloting an innovative mixed reality experience to deliver exposure therapy for contamination-related obsessive-compulsive disorder
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Scientific title
Evaluating the acceptability, adherence, and efficacy of an innovative mixed reality experience to deliver exposure therapy for contamination-related obsessive-compulsive disorder in adults
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Secondary ID [1]
312120
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None
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Obsessive-Compulsive Disorder
334136
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Condition category
Condition code
Mental Health
330811
330811
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0
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Anxiety
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Mental Health
331021
331021
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0
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Other mental health disorders
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
The mixed reality-based exposure and response prevention (MERP) experience was designed by Liminal VR. It will be deployed on the Meta Quest 3, a mixed reality headset that superimposes computer-generated imagery on a real-world view. Within the program, participants will be exposed to and asked to interact with virtual contaminants projected onto a real table which are intended to trigger their contamination-related Obsessive-Compulsive Disorder (C-OCD) concerns. Participants will use their own hands to manipulate the virtual objects. There are three experiences in the exposure – abstract, realistic, and hyper-realistic. The abstract and hyper-realistic experiences will respectively use a half-eaten burger or a half-eaten mouldy burger as the contaminant, while the realistic experience will have a mouldy burger sealed in a plastic box as the contaminant. Each experience will be delivered once only and each take 5 minutes, and the order of experiences will be randomised for each participant. There will be a 5-minute break between each experience where participants will be asked to engage in a neutral filler task (spot the difference puzzles) while still wearing the headset.
After putting on the headset, at the start of each experience, participants will see virtual objects projected onto the table. This includes a virtual partition dividing the table into halves – on the left will be the contaminant (burger) with a blue block placed on top of it and a grey block on the table next to it; the right side will have four differently coloured blocks. Participants will be instructed to place their phone on the bottom right corner of the table. They will then be guided to look at the contaminant and to move the grey block to the right side of the table. Then, they will be prompted to move the blue block to the right side of the table and build a tower with all the blocks. Finally, they will be prompted to interact with their phone on the table by unlocking it and finding a photo that makes them feel neutral. Then the experience will end. The table will be cleaned prior to starting the ambiguous experience.
The student investigator will monitor participant adherence to the MERP experience, which will be accomplished by mirroring what the participant sees through their headset onto the student investigator’s phone using the Meta Quest application.
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Intervention code [1]
328853
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Treatment: Devices
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Comparator / control treatment
No control group
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Control group
Uncontrolled
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Outcomes
Primary outcome [1]
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Treatment acceptability and adherence regarding MERP
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Assessment method [1]
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Treatment Acceptability/Adherence Scale (modified for MERP) - TAAS-M
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Timepoint [1]
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Baseline and post-intervention (following completion of all experiences)
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Primary outcome [2]
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State anxiety
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Assessment method [2]
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Visual analogue scales (0-100)
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Timepoint [2]
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9 times during the intervention (immediately before, midway, and immediately after each of the 3 experiences)
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Primary outcome [3]
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Treatment acceptability and adherence regarding exposure and response prevention (ERP)
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Assessment method [3]
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Treatment Acceptability/Adherence Scale (modified for ERP) - TAAS-E
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Timepoint [3]
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Baseline and post-intervention (following completion of all experiences)
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Secondary outcome [1]
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Psychological flexibility
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Assessment method [1]
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Acceptance and Action Questionnaire for Obsessive Compulsive Disorder (AAQ-OC)
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Timepoint [1]
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Baseline and post-intervention (following completion of all experiences)
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Secondary outcome [2]
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Feedback on intervention
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Assessment method [2]
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Study-specific questionnaire
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Timepoint [2]
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Post-intervention (following completion of all experiences)
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Secondary outcome [3]
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Immersion in the mixed reality-based intervention - This is also an additional primary outcome
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Assessment method [3]
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Temple Presence Inventory (TPI)
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Timepoint [3]
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Post-intervention (following completion of all experiences)
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Secondary outcome [4]
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State disgust - This is also an additional primary outcome
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Assessment method [4]
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Visual analogue scales (0-100)
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Timepoint [4]
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9 times during the intervention (immediately before, midway, and immediately after each of the 3 experiences)
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Eligibility
Key inclusion criteria
Participants will be included in the study if they are aged between 18 and 80 years; meet current DSM-5 diagnostic criteria for OCD with one of their concerns being related to contamination; and fluency in English.
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Minimum age
18
Years
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Maximum age
80
Years
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Sex
Both males and females
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Can healthy volunteers participate?
No
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Key exclusion criteria
Exclusion criteria include a past or present diagnosis of schizophrenia-spectrum or bipolar disorder; a present substance use disorder; acute suicidality; have a cardiac pacemaker or other implanted medical device; have any serious pre-existing health conditions including heart conditions, traumatic brain injury, neck or spinal injury; a history of epilepsy or seizures or other epilepsy-like symptoms; impaired stereo-depth perception, uncorrected astigmatism, or other uncorrected binocular vision abnormalities; or are pregnant.
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Study design
Purpose of the study
Treatment
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Allocation to intervention
Non-randomised trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Open (masking not used)
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Who is / are masked / blinded?
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Intervention assignment
Single group
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Other design features
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Phase
Not Applicable
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Type of endpoint/s
Efficacy
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Statistical methods / analysis
Jamovi will be used to analyse the data. To assess feasibility and acceptability of the study (Hypothesis 1), descriptive statistics of scores on the TPI and post-intervention TAAS-M will be reviewed. In addition, paired samples t-tests will compare pre- and post-MERP scores on the anxiety and disgust VAS. To assess whether acceptability of MERP is positively associated with acceptability of in vivo ERP (Hypothesis 2), linear mixed effects modelling will be used to predict pre to post changes in TAAS-E from pre to post TAAS-M. We will also conduct a qualitative analysis on participant feedback on the intervention.
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
1/11/2024
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Actual
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
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Sample size
Target
20
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Accrual to date
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Final
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Recruitment in Australia
Recruitment state(s)
VIC
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Funding & Sponsors
Funding source category [1]
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University
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Name [1]
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Swinburne University of Technology School of Health Sciences Small Research Grants (11.2711.33215)
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Address [1]
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Country [1]
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Australia
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Primary sponsor type
University
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Name
Swinburne University of Technology
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Address
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Country
Australia
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Secondary sponsor category [1]
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None
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Name [1]
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Address [1]
318979
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Country [1]
318979
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Ethics approval
Ethics application status
Submitted, not yet approved
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Ethics committee name [1]
315271
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Swinburne University of Technology Human Research Ethics Committee
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Ethics committee address [1]
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https://www.swinburne.edu.au/research/ethics/human-research/
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Ethics committee country [1]
315271
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Australia
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Date submitted for ethics approval [1]
315271
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28/06/2024
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Approval date [1]
315271
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09/08/2024
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Ethics approval number [1]
315271
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20247996-19317
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Summary
Brief summary
The aim of this study is to develop a mixed reality-based exposure and response prevention intervention (MERP) that targets contamination fears and to assess its feasibility and acceptability in a clinical OCD sample. A secondary aim of this study is to explore whether MERP increases the acceptability of in vivo exposure and response prevention (ERP). We hypothesise that participants will find MERP acceptable, immersive, and able to elicit contamination fears (i.e., feasible). We also hypothesise that acceptability of MERP is positively associated with the acceptability of in vivo ERP. This study is a single-arm pilot study (Phase I Clinical Trial).
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Dr Kelvin (Shiu Fung) Wong
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Address
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Swinburne University of Technology, John Street, Hawthorn, VIC, 3122
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Country
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Australia
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Phone
134186
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+61 3 9214 5161
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Fax
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Email
134186
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[email protected]
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Contact person for public queries
Name
134187
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Kelvin (Shiu Fung) Wong
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Address
134187
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Swinburne University of Technology, John Street, Hawthorn, VIC, 3122
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Country
134187
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Australia
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Phone
134187
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+61 3 9214 5161
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Fax
134187
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Email
134187
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[email protected]
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Contact person for scientific queries
Name
134188
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Kelvin (Shiu Fung) Wong
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Address
134188
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Swinburne University of Technology, John Street, Hawthorn, VIC, 3122
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Country
134188
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Australia
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Phone
134188
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+61 3 9214 5161
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Fax
134188
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Email
134188
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
Yes
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What data in particular will be shared?
All of the individual participant data collected during the trial, after de-identification.
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When will data be available (start and end dates)?
Immediately following publication, no end date.
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Available to whom?
De-identified data will be available to other researchers on data sharing platforms (e.g., the Open Science Framework) and/or shared with colleagues for research purposes (e.g., meta-analyses).
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Available for what types of analyses?
Any purpose.
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How or where can data be obtained?
Unrestricted access via web address (https://osf.io/), access subject to approvals by Principal Investigator (
[email protected]
).
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What supporting documents are/will be available?
No Supporting Document Provided
Doc. No.
Type
Citation
Link
Email
Other Details
Attachment
23902
Other
Materials and measures
387782-(Uploaded-18-06-2024-14-28-00)-Materials and measures.docx
24086
Study protocol
387782-(Uploaded-09-08-2024-09-53-26)-Research protocol - MERP v2.2.docx
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
Download to PDF