A spatially oriented decision does not induce consciousness in a motor task

被引:21
作者
Bridgeman, B [1 ]
Huemer, V [1 ]
机构
[1] Univ Calif Santa Cruz, Dept Psychol, Santa Cruz, CA 95064 USA
基金
美国国家航空航天局;
关键词
D O I
10.1006/ccog.1998.0357
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Visual information follows at least two branches in the human nervous system, following a common input stage: a cognitive "what" branch governs perception and experience, while a sensorimotor "how" branch handles visually guided behavior though its outputs are unconscious. The sensorimotor system is probed with an isomorphic task, requiring a 1:1 relationship between target position and motor response. The cognitive system, in contrast, is probed with a forced qualitative decision, expressed verbally, about the location of a target. Normally, the cognitive system is influenced by context-induced illusions of visual direction, while the sensorimotor system is not. Here, we inquire whether the process of making a spatially based decision is critical in forcing subjects to use the information in the cognitive system for spatial tasks. Subjects hear a tone that determines whether they jab an "X" or an "O" with the forefinger. Despite making a decision about which target to contact, the jab is not influenced by the position of a surrounding frame, indicating that choice can be handled within the context-insensitive sensorimotor system. (C) 1998 Academic Press.
引用
收藏
页码:454 / 464
页数:11
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