Assessing lag perception in electronic sketching
Proceedings of the 7th Nordic Conference on Human-Computer Interaction: Making Sense Through Design
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In this study, the spatiotemporal characteristics of human speed perception are measured in the spatiotemporal frequency domain through a psychophysical experiment. Based on the experimental results, the mechanism for speed perception is investigated. The existence of a speed-tuned mechanism and the role of the temporal frequency in speed perception are demonstrated. The method of speed comparison by simultaneous presentation is used in the experiment. Two moving gratings are used as the standard and the comparison stimuli, and the “stimulation of subjectively equal speed” (SSES) is determined for the standard stimulus in spatiotemporal frequency coordinates. As experimental results, two different spatiotemporal characteristics are shown. For the speed range lower than 3.2 deg/s, the speed perception depends only on the physical speed of the stimulus, which suggests the existence of a speed-tuned mechanism. In the range higher than that value, the speed perception depends on the physical speed and the temporal frequency of the stimulus, indicating that both a speed-tuned mechanism and a temporal frequency-tuned mechanism are involved. Based on these experimental results, the human mechanism in speed perception is described by using a speed-tuned mechanism and a temporal frequency-tuned mechanism. A basic framework for a speed perception model is proposed. © 2005 Wiley Periodicals, Inc. Syst Comp Jpn, 36(13): 1–12, 2005; Published online in Wiley InterScience (). DOI 10.1002/scj.20369