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Masking of Motion Cues by Random Motion: Comparison of Human Performance with a Signal Detection Model

机译:随机运动掩蔽运动线索:人体表现与信号检测模型的比较

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An investigation of human sensitivity to whole-body motion is described. Specifically, the ability of human subjects to detect a sinusoidal motion signal superimposed on a background of random motion is discussed. The purpose was to determine the conditions in which motion cues are masked or hidden by concurrent random motion. The results have applications to flight simulation, and will also be of interest to other researchers working in the area of human perceptual performance. It is proposed that for the situation under study, motion perception is a signal-in-noise detection process which can be modelled using signal detection theory. A brief review of signal detection theory is provided. Three ideal detectors adapted from the literature on auditory perception were proposed as potential models for motion perception. Three motion perception experiments were run. All three experiments provided an estimate of the slope of the psychometric curve. Of the three ideal detectors considered, the energy detector agrees best with the experimental data. The data are compared in detail with the predictions of the energy detector. A simplified method for estimating signal detectability in arbitrary conditions is presented. Finally, the implications of the results for flight simulation are discussed.

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