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VStore: A Novel Virtual Reality Assessment of Functional Cognition

Porffy, Lilla, Mehta, Mitul, Patchitt, Joel, Boussebaa, Celia, Brett, Jack, D'Oliveira, Teresa, Mouchlianitis, Elias, Shergill, Sukhi S. (2021) VStore: A Novel Virtual Reality Assessment of Functional Cognition. Journal of International Medical Research, . ISSN 0300-0605. E-ISSN 1473-2300. (In press) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided) (KAR id:96363)

The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided. (Contact us about this Publication)

Abstract

Background: Cognitive deficits are present in a number of neuropsychiatric disorders including, Alzheimer’s disease, schizophrenia and depression. Assessments used to measure cognition in these disorders are time-consuming, burdensome, and have low ecological validity. To address these limitations, we developed a novel virtual reality shopping task - VStore. Objectives: This study aims to establish the construct validity of VStore in relation to the established computerized cognitive battery, Cogstate; and explore its sensitivity to age-related cognitive decline. Methods: Hundred and forty-two healthy volunteers aged 20-79 took part in the study. Main VStore outcomes included: 1) verbal recall of 12 grocery items, 2) time to collect items, 3) time to select items on a self-checkout machine, 4) time to make the payment, 5) time to order coffee, and 6) total completion time. Construct validity was examined through a series of backward elimination regression models to establish which Cogstate tasks, measuring attention, processing speed, verbal and visual learning, working memory, executive function, and paired associate learning, in addition to age and technological familiarity, best predicted VStore performance. Also, two ridge regression and two logistic regression models supplemented with receiver operating characteristic curves were built; with VStore outcomes in the first, and Cogstate outcomes in the second model entered as predictors of age and age cohorts, respectively. Results: Overall VStore performance, as indexed by the total time spent completing the task, was best explained by Cogstate tasks measuring attention, working memory, paired associate learning, and age and technological familiarity, accounting for 47 of the variance. In addition, with lambda = 5.16, the ridge regression model selected five parameters for VStore when predicting age (MSE = 185.80, SE= 19.34). With lambda = 9.49 for Cogstate, the model selected all eight tasks (MSE = 226.80, SE = 23.48). Finally, VStore was found to be highly sensitive (86) and specific (96) to age cohorts with 95 of the area under the receiver operating characteristic curve. Conclusions: Our findings suggest that VStore is a promising assessment that engages standard cognitive domains and shows sensitivity to age-related cognitive decline.

Item Type: Article
Uncontrolled keywords: Virtual reality, Virtual reality assessment, Cognition, Functional cognition, Functional capacity, Neuropsychological testing, VR
Subjects: R Medicine
Divisions: Divisions > Division of Natural Sciences > Kent and Medway Medical School
Funders: King's College London (https://ror.org/0220mzb33)
Medical Research Council (https://ror.org/03x94j517)
Depositing User: Rachael Heller
Date Deposited: 27 Sep 2022 12:40 UTC
Last Modified: 29 Sep 2022 10:41 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/96363 (The current URI for this page, for reference purposes)
Shergill, Sukhi S.: https://orcid.org/0000-0003-4928-9100
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