The Importance Of The Secondary Modality Auditory - amazonia.fiocruz.br

Toggle Navigation ReadkonG. Auditory stimuli degrade visual performance in virtual reality Page created by Sheila Chapman.

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Page content transcription If your browser does not render page correctly, please read the page content below. A Illustrative gaze behavior during presentation of Modalitu visual target that was not detected, corresponding to a biCond stimulus. The colored points represent gaze position during a 2-s window centered around the visual target onset. Gaze position when the target is present is marked with a gray point and associated black dashed lines.

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Note that, despite gaze being very close to the target location during its onset, there is no detection. B 1D visualization of gaze position only x coordinate over time during the same trial presented in A.

Gaze samples corresponding to fixations are shown as yellow points, other gaze samples as blue points, the temporal interval during which the target is present is marked in gray, and the target position in x is marked by a dashed red horizontal line. We find a consistent and significant degradation of detection and recognition of visual targets in the presence of temporally congruent auditory stimuli.

The authors reported a performance drop from Our results show the same trend, and further suggest that, in the presence of higher cognitive loads, the degradation effect is more prominent, across a wide range of audiovisual stimuli. Possible reasons include the increased realism of our experiment, the increased complexity of the task which includes binary detection as well as an additional five- level recognition taskand the fact that users were able to move during the experiment; all these may lead to higher cognitive loads. Besides cognitive load, the fact that sound is spatialized inside the virtual environment, and presented in rear space in a spatially incongruent manner with respect to the visual targets might further influence the effect The Importance Of The Secondary Modality Auditory.

Additionally, Hidaka and Ide report a bigger effect when sounds were presented in an ipsilateral, spatially congruent manner.

We did not find this effect with binaural spatialized sounds. Hence, their findings might be related with monoaural sounds rather than with the spatial congruency of visual TThe auditory stimuli. We chose to use target stimuli that were not semantically related to the background scene, both in its visual and auditory aspects.

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We took a conservative approach, and designed the target visual stimuli as simple, white geometrical shapes that clearly stand out from the rest of the scene, to minimize the risk of fortuitous oversights. More contextually integrated visual stimuli may have lower detection percentages when compared to the visual targets used in this experiment. Our analysis of gaze behavior shows that visual degradation occurs even in the presence of fixations and with gaze near or at the location of the visual target.]