University of Alberta, Edmonton, Alberta, Canada.
Psychon Bull Rev. 2017 Dec;24(6):1943-1948. doi: 10.3758/s13423-017-1253-4.
The SNARC effect is the finding that left-hand responses are faster to small digits and right-hand responses are faster to large digits. I tested an episodic-retrieval account of the SNARC effect in which it is assumed that the response time varies as a function of the prior trial episodes available in working memory. Blocks of trials were constructed in which two digits were repeated 75% of the time; presumably, these two "focus" digits would be readily available in working memory. Under such circumstances, there was no overall SNARC effect. Instead, response times were faster when the stimulus-response mapping was consistent with most of the trials in the block. This means that the usual SNARC effect was obtained when the focus digits were consistent with that effect, and that a reverse SNARC effect was obtained when responses to those digits were inconsistent with it.
SNARC 效应是指左手对小数字的反应更快，而右手对大数字的反应更快。我测试了 SNARC 效应的情节检索解释，其中假设反应时间随工作记忆中可用的先前试验情节而变化。试验块被构造为两个数字重复出现 75%的时间；大概，这两个“焦点”数字将很容易在工作记忆中获得。在这种情况下，没有整体的 SNARC 效应。相反，当刺激-反应映射与块中的大多数试验一致时，反应时间更快。这意味着当焦点数字与该效应一致时，通常会出现 SNARC 效应，而当对这些数字的反应与该效应不一致时，会出现反向 SNARC 效应。
