Numerous children diagnosed with Autism Spectrum Disorder (ASD) exhibit abnormal eye gaze pattern in communication and social interaction. Due to the high cost of ASD interventions and a shortage of professional therapists, researchers have explored the use of virtual reality (VR) systems as a supplementary intervention for autistic children. This paper presents the design of a novel VR-based system called the Hide and Seek Virtual Reality System (HSVRS). The HSVRS allows children with ASD to enhance their ocular gaze abilities while engaging in a hide-and-seek game with a virtual avatar. By employing face and voice manipulation technology, the HSVRS provides the option to customize the appearance and voice of the avatar, making it resemble someone familiar to the child, such as their parents. We conducted a pilot study at the Third Affiliated Hospital of Sun Yat-sen University, China, to evaluate the feasibility of HSVRS as an auxiliary intervention for children with autism (N=24). Through the analysis of subjective questionnaires completed by the participants' parents and objective eye gaze data, we observed that children in the VR-assisted intervention group demonstrated better performance compared to those in the control group. Furthermore, our findings indicate that the utilization of face and voice manipulation techniques to personalize avatars in hide-and-seek games can enhance the efficiency and effectiveness of the system.
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