Benson A J, Hutt E C, Brown S F
Royal Air Force Institute of Aviation Medicine, Farnborough, Hampshire, United Kingdom.
Aviat Space Environ Med. 1989 Mar;60(3):205-13.
Thresholds for the detection (at p = 0.75 correct) of the direction of discrete angular movements about a vertical Z axis, having a cosine bell velocity trajectory and a duration of 3.3 s, were determined using an adaptive psychophysical procedure. In 30 subjects the mean threshold for the detection of Z axis stimuli was 1.5 deg.s-1. X and Y axis thresholds of 20 subjects had mean values of 2.04 and 2.07 deg.5(-1), respectively, and were significantly higher than Z axis thresholds. The mean Z axis threshold of 6 subjects, who viewed a visual target fixed to the turntable, was reduced by 8.6 dB over that obtained in darkness. Z axis thresholds were found to increase at 5.9 dB/decade as a function of stimulus duration over the range 0.9 to 20 s. The possible implication of this finding in relation to the dynamics of the sensory system mediating the perception of whole-body angular movement is discussed.
使用自适应心理物理学程序确定了对于围绕垂直Z轴的离散角运动方向的检测阈值（正确概率为0.75），这些角运动具有余弦钟形速度轨迹且持续时间为3.3秒。在30名受试者中，检测Z轴刺激的平均阈值为1.5度·秒⁻¹。20名受试者的X轴和Y轴阈值的平均值分别为2.04和2.07度·秒⁻¹，且显著高于Z轴阈值。6名观看固定在转盘上的视觉目标的受试者的Z轴平均阈值比在黑暗中获得的阈值降低了8.6分贝。发现在0.9至20秒的范围内，Z轴阈值作为刺激持续时间的函数以5.9分贝/十倍频程的速率增加。讨论了这一发现与介导全身角运动感知的感觉系统动力学的可能关联。
