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• W4243179611 abstract "<sec> <title>BACKGROUND</title> Virtual humans (VH) are computer-generated characters that appear humanlike and simulate face-to-face conversations using verbal and nonverbal cues. Unlike formless conversational agents, like smart speakers or chatbots, VH bring together the capabilities of both a conversational agent and an interactive avatar (computer-represented digital characters). Although their use in patient-facing systems has garnered substantial interest, it is unknown to what extent VH are effective in health applications. </sec> <sec> <title>OBJECTIVE</title> The purpose of this review was to examine the effectiveness of VH in patient-facing systems. The design and implementation characteristics of these systems were also examined. </sec> <sec> <title>METHODS</title> Electronic bibliographic databases were searched for peer-reviewed articles with relevant key terms. Studies were included in the systematic review if they designed or evaluated VH in patient-facing systems. Of the included studies, studies that used a randomized controlled trial to evaluate VH were included in the meta-analysis; they were then summarized using the PICOTS framework (population, intervention, comparison group, outcomes, time frame, setting). Summary effect sizes, using random-effects models, were calculated, and the risk of bias was assessed. </sec> <sec> <title>RESULTS</title> Among the 8,125 unique records identified, 53 articles describing 33 unique systems, were qualitatively, systematically reviewed. Two distinct design categories emerged — simple VH and VH augmented with health sensors and trackers. Of the 53 articles, 16 (26 studies) with 44 primary and 22 secondary outcomes were included in the meta-analysis. Meta-analysis of the 44 primary outcome measures revealed a significant difference between intervention and control conditions, favoring the VH intervention (SMD = .166, 95% CI .039-.292, <i>P</i>=.012), but with evidence of some heterogeneity, <i>I²</i>=49.3%. There were more cross-sectional (<i>k</i>=15) than longitudinal studies (<i>k</i>=11). The intervention was delivered using a personal computer in most studies (<i>k</i>=18), followed by a tablet (<i>k</i>=4), mobile kiosk (<i>k</i>=2), head-mounted display (<i>k</i>=1), and a desktop computer in a community center (<i>k</i>=1). </sec> <sec> <title>CONCLUSIONS</title> We offer evidence for the efficacy of VH in patient-facing systems. Considering that studies included different population and outcome types, more focused analysis is needed in the future. Future studies also need to identify what features of virtual human interventions contribute toward their effectiveness. </sec>" @default.
• W4243179611 created "2022-05-12" @default.
• W4243179611 creator A5026484253 @default.
• W4243179611 creator A5034469448 @default.
• W4243179611 creator A5073730098 @default.
• W4243179611 creator A5080496776 @default.
• W4243179611 date "2020-03-23" @default.
• W4243179611 modified "2023-09-27" @default.
• W4243179611 title "Computer-Controlled Virtual Humans in Patient-Facing Systems: Systematic Review and Meta-Analysis (Preprint)" @default.
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