Robert Kenneth Gray

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We have been developing a haptic back display using a 3-by-3 tactor array. This paper reports two studies that investigated the use of such a display for delivering attentionand direction-related information to its user. The first study measured the effectiveness of haptic cues in redirecting an observer’s visual spatial attention. The observer was first(More)
This study is part of an ongoing program designed to investigate the integration of visual and haptic information in the context of multimodal interfaces. With the current experiments, we study whether haptic cues can be used to redirect spatial attention in a visual task where an observer is asked to detect a change between two scenes. Subjects were asked(More)
Nine cases of angiodysplasia have been angiographically identified in the past eight years at the two teaching and two major private hospitals in the West Los Angeles-Santa Monica area. In seven patients, repeated massive hematochezia whose source had escaped previous intensive diagnostic studies, was the indication for angiography. Two malformations were(More)