数字SNARC效应的发生阶段
The occurrence stage of SNARC effect
目前关于数字SNARC效应发生在早期的刺激表征阶段还是晚期的反应选择阶段的结果不一。本研究通过3个实验探究了其发生阶段。采用整体−局部范式，构建了一种复合实验刺激——由数字构成的箭头，并以此为实验材料，分别要求被试比较数字大小（箭头方向的整体优先表征干扰数字的空间表征）和判断箭头方向（箭头方向判断任务在反应选择阶段与数字加工产生反应竞争）。结果发现，水平方向干扰数字的空间表征阻碍了数字SNARC效应产生（实验1a）；垂直方向干扰数字的空间表征对数字SNARC效应没有影响（实验1b）；干扰反应选择阶段阻碍了数字SNARC效应产生（实验2）。实验结果表明干扰数字加工的刺激表征阶段和反应选择阶段都会影响数字SNARC效应的产生，支持数字SNARC效应的双阶段加工模型。
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整体−局部范式数字SNARC效应早期刺激表征阶段晚期反应选择阶段
王铖铖,盛缨莹,赵宇飞,肖梦施,韩磊,赵庆柏.数字SNARC效应的发生阶段[EB/OL].(2024-08-27)[2025-11-07].https://chinaxiv.org/abs/202408.00252.点此复制
The spatial-numerical association of response codes (SNARC) effect demonstrates that responding to small numbers with the left key is faster than responding with the right key, while the converse is true for large numbers. A long-standing debate has been whether the SNARC effect occurs only in the early stimulus-representation stage, only in the late response-selection stage or in both stages simultaneously. The study aims to manipulate two processing stages to investigate the effects of interference with the early stimulus-representation and late response-selection on the SNARC effect.Combining numbers with arrows by the global and local paradigm, a compound stimulusarrows made up with numberswas designed as experimental materials. In experiment 1a, a within-subject experimental design with 2(Number magnitude: small, large) 3 (Arrow direction: left, right, left-right bidirectional) 2 (Response hand: left hand, right hand) was conducted. 40 subjects were asked to judge whether the number is larger or smaller than 5. In experiment 1b, a within-subject experimental design with 2(Number magnitude: small, large) 3 (Arrow direction: up, down, up-down bidirectional) 2 (Response hand: left hand, right hand) was employed. 40 subjects were asked to judge whether the number is larger or smaller than 5. The experimental design in experiment 2 is as the same as the experiment 1a, however, 40 subjects were asked to judge whether the arrow is left or right.Results showed that horizontal interference with the spatial representation of numbers hindered the emergence of the SNARC effect (Experiment 1a), however, vertical interference with the spatial representation of numbers had no influence on the SNARC effect (Experiment 1b). Interference with the response selection stage impeded the emergence of the SNARC effect (Experiment 2).According to the global precedence theory, global representation of horizontal arrow directions interferes with the spatial representation process of local numbers, thereby the SNARC effect in experiment 1a disappeared. According to the mental number line theory, individuals mentally represent numbers based on a left-to-right mental number line. Thus, the interference from the global representation of vertical arrow directions doesnt influence the SNARC effect in experiment 1b. When arrows made up with numbers are used in experiment 2 requiring participants to judge arrow directions, the numbers can be automatically processed and adequately spatially represented at an unconscious level. However, due to the arrow direction judgment task consumes cognitive resources or occupies the corresponding reaction position during the response-selection stage, the SNARC effect diminishes.In summary, both the early stimulate-representation stage and the late response-selection stage play important roles in the occurrence of SNARC effect, supporting the two-stage processing model of SNARC effect.Keywords the global and local paradigm, SNARC effect; the early stimulate-representation stage, the late response-selection stage
the global and local paradigmSNARC effectthe early stimulate-representation stagethe late response-selection stage
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