Traditionally, virtual reality (VR) exposure-based treatment concentrates primarily on the presentation of a high-fidelity visual experience. However, adequately combining the visual and the auditory experience provides a powerful tool to enhance sensory processing and modulate attention. We present the design and usability testing of an auditory–visual interactive environment for investigating VR exposure-based treatment for cynophobia. The specificity of our application involves 3D sound, allowing the presentation and spatial manipulations of a fearful stimulus in the auditory modality and in the visual modality. We conducted an evaluation test with 10 participants who fear dogs to assess the capacity of our auditory–visual virtual environment (VE) to generate fear reactions. The specific perceptual characteristics of the dog model that were implemented in the VE were highly arousing, suggesting that VR is a promising tool to treat cynophobia.
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