Stimulus-response compatibility in representational space
Stimulus-response compatibility in representational space
复制标题
DOI：
10.1016/s0028-3932(98)00002-5
复制
发表时间：
1998-08-01
期刊：
影响因子：
2.6
通讯作者：
Brugger, P
中科院分区：
文献类型：
--
作者：
Bächtold, D;Baumüller, M;Brugger, P
空间刺激-反应（S-R）兼容性是指观察到，同侧手对单侧刺激的快速反应比包含刺激的感觉半场的对侧手更快。在涉及在视野中心呈现数字 1 到 11 的两个实验中，我们展示了（1）对于将数字视为尺子上的距离的受试者，对于小于 6 的数字具有左手反应时间（RT）优势，对于那些 > 6 的数字具有右手优势；（2）对于将数字视为钟面上的小时的受试者，这种 RT 优势相反。虽然第一个任务（RULER）中的结果复制了数字处理神经心理学（“SNARC 效应”）中的有力发现，但第二个任务（CLOCK）中的结果表明，表征空间中数字尺度从左到右的扩展不能成为观察到的手与数字大小之间相互作用的决定性因素。总而言之，这两项任务的发现最好用侧化心理表征和侧化运动输出之间的相互作用来解释（即表征空间中传统空间 S-R 兼容性效应的模拟）。我们讨论了这两项任务在忽视表征空间的患者中的潜在临床应用。 (C) 1998 Elsevier Science Ltd. 保留所有权利。
Spatial stimulus-response (S-R) compatibility designates the observation that speeded reactions to unilateral stimuli are faster for the hand ipsilateral than for the hand contralateral to the sensory hemifield containing the stimulus. In two experiments involving presentation of the numbers 1 to 11 in the center of the visual field we show (1) a left-hand reaction time (RT) advantage for numerals < 6 and a right-hand advantage for those > 6 for subjects who conceive of the numbers as distances on a ruler, and (2) a reversal of this RT advantage for subjects who conceive of them as hours on a clock face. While the results in the first task (RULER) replicate a robust finding from the neuropsychology of number processing (the "SNARC effect") those in the second task (CLOCK) show that extension of the number scale from left to right in representational space cannot be the decisive factor for the observed interaction between hand and number size. Taken together, the findings in the two tasks are best accounted for in terms of an interaction between lateralized mental representations and lateralized motor outputs (i.e. an analog of traditional spatial S-R compatibility effects in representational space). We discuss potential clinical applications of the two tasks in patients with neglect of representational space. (C) 1998 Elsevier Science Ltd. All rights reserved.