The perceived range of a space indicated by pointing(Summaries of Awarded Presentation at the 28th Annual Meeting)

抄録

Finger pointing is used to cue an interesting object or position. In this study, we evaluated the area size designated by finger pointing using a visual search task. In general, a target is detected faster when it was cued by any method, including finger pointing. Experiment 1 revealed that observers conduct a visual search faster when the target position is specified by pointing, than in a no-cue condition. The improvement using pointing was comparable to that by conventional cueing with a line segment. In Experiment 2 the stimulus display was physically delimited by line frames to reduce the number of stimulus items to undergo a visual search. The data were compared to those from Experiment 1 to obtain the actual limitation realized by pointing. This analysis suggested that the observers' attention was limited to within 10 to 15 degrees radius by the effect of pointing..