身体正直及倾斜不同角度定位的实验研究

STUDY ON PERCEPTION OF POSTURAL VERTICAL AND BODY TILTS

本文探讨了身体正直及倾斜不同角度(0°—90°)的定位。结果表明:(1)在暗室排除视觉的条件下,身体正直姿势的定位平均误差值在1.2°—1.61°范围;在亮室有视觉参与条件下,平均误差值为0.88°、不超过1°。(2)在暗室排除视觉条件下,“语言一身体”条件的各个角度定位的准确性最差,其次是“视觉—身体”条件,“身体—身体”条件的结果最好。这种情况表明,身体角度定位明显受信息的传入方式及信息转换和输出的难易程度的影响,相同感觉道在信息传入、处理和输出上具有更大的优越性。

The accuracy of perception of postural vertical (0°) and body tilts (15°)、30°、45°、60°、75°and 90° right or left to the body) was investigated under fourperceptual conditions by means of a tilting chair. It was found that when thesubjects set their body to tbe vertical without the aid of vision in a dark room,an average error of 1.6°to the true vertical was produced. When subjects settheir body under normal circumstances in the illuminated room and could getthe aid of visual information, tbe accuracy of judgments increased, the averageerror is 0.8° not more than one degree to the true vertical.The results show that there was a significant difference between thesevarious perceptual conditions made in the dark. The "Verbal-Body" conditionproduced larger errors than the other conditions, and the subjects in the "Vi-sion-Body" condition obtained a little error reduction. The most accurate con-dition of judgments of body positiou was found in "Body-Body" condition. How-ever, in all of these conditions, the subjects made underestimations. We sug-gested that the accuracy of perception of body position was affected remar-kably by the perceptual modality and difficuty of information transmission inperceptual processes, the ipsemodal performance (the standard and the comp-arisons were perceived by the same modality) had more advantages in the in-formation transmission and in the information processing over the cross-modalperformance.