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Augmented reality (AR) technologies can help to overcome these limitations. Evidence supports the use of AR in exposure treatment for small animal phobia. A new projection-based AR exposure treatment system (P-ARET) that offers the possibility of projecting the animals in a natural and non-intrusive environment has been developed. There are no randomised controlled trials (RCTs) available that have tested the efficacy of this system in cockroach phobia. This paper aims to present the protocol of an RCT that evaluates the efficacy of the P-ARET, versus an IVET group and a waiting list control group (WL), in carrying out exposure treatment for cockroach phobia.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods\/design<\/jats:title><jats:p>Participants will be randomly allocated to one of three conditions: (1) P-ARET, (2) IVET and (3) WL. Both treatment conditions will follow the \u2018one-session treatment\u2019 guidelines. As a diagnostic measure, the Anxiety Disorders Interview Schedule for Diagnostic and Statistical Manual for Mental Health Disorders-Version 5 will be used. The Behavioral Avoidance Test will be used as the primary outcome measure. Secondary outcome measures will include an attentional biases task (measured using eye-tracking technology), the Fear of Cockroaches Questionnaire, Cockroach Phobia Beliefs Questionnaire, Fear and Avoidance Scales, Beck Depression Inventory second edition, Disgust Propensity and Sensitivity Scale-Revised-12, State-Trait Anxiety Inventory, Clinician Severity Scale, and Expectation and Satisfaction with the Treatment Scale. The evaluation protocol will include pretreatment and post-treatment evaluations and 1, 6 and 12 months of follow-ups. Intention-to-treat and per-protocol analyses will be performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Ethics and dissemination<\/jats:title><jats:p>This study has been approved by the Ethics Committee of Universitat Jaume I (Castell\u00f3n, Spain; 13 December 2019). The results of the presented RCT will be disseminated in presentations at international scientific meetings and peer-reviewed scientific journals.<\/jats:p><\/jats:sec><jats:sec><jats:title>Trial registration number<\/jats:title><jats:p><jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT04563390\">NCT04563390<\/jats:ext-link>.<\/jats:p><\/jats:sec>","DOI":"10.1136\/bmjopen-2022-069025","type":"journal-article","created":{"date-parts":[[2023,5,19]],"date-time":"2023-05-19T12:11:09Z","timestamp":1684498269000},"page":"e069025","update-policy":"https:\/\/doi.org\/10.1136\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":3,"title":["Effectiveness of a projection-based augmented reality exposure system in treating cockroach phobia: study protocol of a randomised controlled trial"],"prefix":"10.1136","volume":"13","clinical-trial-number":[{"clinical-trial-number":"nct04563390","registry":"10.18810\/clinical-trials-gov"},{"clinical-trial-number":"nct04563390","registry":"10.18810\/clinical-trials-gov"}],"author":[{"given":"Jorge","family":"Grimaldos","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juana","family":"Bret\u00f3n-L\u00f3pez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mar\u00eda","family":"Palau-Batet","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Laura","family":"D\u00edaz-Sanahuja","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8973-1250","authenticated-orcid":false,"given":"Soledad","family":"Quero","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"239","published-online":{"date-parts":[[2023,5,19]]},"reference":[{"key":"2023051905101103000_13.5.e069025.1","unstructured":"Kendall T , Pilling T . 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