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Rivalry and interference with a head-mounted display

Published:01 September 2002Publication History
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Abstract

Perceptual factors that affect monocular, transparent (a.k.a "see-thru") head-mounted displays include binocular rivalry, visual interference, and depth of focus. We report the results of an experiment designed to evaluate the effects of these factors on user performance in a table look-up task. Two backgrounds were used. A dynamic moving background was provided by a large screen TV and an untidy bookshelf was used to provide a complex static background. With the TV background large effects were found attributable to both rivalry and visual interference. These two effects were roughly additive. Smaller effects were found with the bookshelf. In conclusion we suggest that monocular transparent HMDs may be unsuitable for use in visually dynamic environments. However when backgrounds are relatively static, having a transparent display may be preferable to having an opaque display.

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      D.C. Charles Hair

      Laramee describes empirical research investigating the effects of certain perceptual factors on the performance of users of monocular, transparent, head-mounted displays (HMDs). HMDs are receiving increased usage as a means of providing high-resolution displays with minimal inconvenience to the user. One particular area of interest is the use of HMDs to provide information relating to the real world. There are two basic distinctions between types of HMDs. They can be either monocular or binocular. The displays can also be opaque, meaning that the user cannot see a real-world background, or transparent. The experiments described in this paper measured the ability of subjects to respond to questions relating to the virtual displays they could see with the HMDs. The real-world background consisted of either a static, untidy bookshelf, or of a movie shown on a television monitor. Conditions were varied, in order to test for the effects of binocular rivalry, depth of focus, and visual interference. As expected, the results showed a greater effect related to the dynamic background. The effect was attributable to both rivalry and visual interference. The results suggest that HMDs are not suitable for use in visually dynamic environments. The paper is well written and informative. It concludes with some interesting ideas for future research on HMDs. There is also a good list of references. Online Computing Reviews Service

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