Gallace Alberto, Tan Hong Z, Spence Charles
Department of Experimental Psychology, University of Oxford, Oxford OX 1 3UD, England.
Psychon Bull Rev. 2006 Apr;13(2):300-3. doi: 10.3758/bf03193847.
A large body of empirical research now shows that people are surprisingly poor at detecting significant changes in visually presented scenes. This phenomenon is known as change blindness in vision. A similar phenomenon occurs in audition, but to date no such effect has been documented in touch. In the present study, we explored the ability of people to detect changes introduced between two consecutively presented vibrotactile patterns presented over the body surface. The patterns consisted of two or three vibrotactile stimuli presented for 200 msec. The position of one of the vibrotactile stimuli composing the display was repeatedly changed (alternating between two different positions) on 50% of the trials, but the same pattern was presented repeatedly on the remaining trials. Three conditions were investigated: No interval between the patterns, an empty interval between the patterns, and a masked interval between the patterns. Change detection was near perfect in the no-interval block. Performance deteriorated somewhat in the empty-interval block, but by far the worst change detection performance occurred in the masked-interval block. These results demonstrate that "change blindness" can also affect tactile perception.
大量实证研究表明，人们在察觉视觉呈现场景中的显著变化方面出奇地差。这种现象在视觉上被称为变化盲视。类似的现象也出现在听觉中，但迄今为止，触觉方面尚未有此类效应的记录。在本研究中，我们探究了人们检测在体表连续呈现的两个振动触觉模式之间引入的变化的能力。这些模式由两到三个持续200毫秒的振动触觉刺激组成。在50%的试验中，构成显示的振动触觉刺激之一的位置反复变化（在两个不同位置之间交替），但在其余试验中反复呈现相同的模式。研究了三种情况：模式之间无间隔、模式之间有空间隔以及模式之间有掩蔽间隔。在无间隔组中，变化检测近乎完美。在空间隔组中，表现略有下降，但迄今为止，最差的变化检测表现出现在掩蔽间隔组中。这些结果表明，“变化盲视”也会影响触觉感知。
