Contrast and assimilation in categorization and exemplar production
Contrast and assimilation in categorization and exemplar production
复制标题
分类和范例制作中的对比和同化
DOI：
10.3758/s13414-010-0036-z
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Douglas J. K. Mewhort
中科院分区：
文献类型：
--
作者：
V. Zotov;Michael N. Jones;Douglas J. K. Mewhort
我们在三个任务中研究了对比和同化：样例生成任务、分类任务和组合的分类后生成任务。在第一个任务的每一次试验中，当提示类别标签时，受试者都会产生一个圆圈。在第二项任务中，他们将长度不同的线条分为四类。在组合任务的每次试验中，他们将两条线分类，然后在类别标签提示时产生一条线。所有三项任务都得出了相同的结论：受试者对类别的表征（在生产任务中以像素为单位，在分类中以错误的方向为单位）从一次试验到另一次试验有系统地转移。当连续的刺激来自同一类别时，该类别的表征被拉向前一次试验的样本。当连续刺激来自不同的类别时，相邻类别的表征被从初始刺激的类别中推出来。我们的结论是，分类和识别的帐户必须同时容纳同化和对比的功能，审判到审判的代表性的转变。
We studied contrast and assimilation in three tasks: an exemplar-production task, a categorization task, and a combined categorization-then-production task. On each trial of the first task, subjects produced a circle when prompted with a category label. In the second task, they classified lines that differed in length into one of four categories. On each trial of the combined task, they classified two lines and then produced a line when prompted by a category label. All three tasks converged on the same conclusion: subjects’ representation of the categories (measured in pixels in the production tasks and by the direction of errors in classification) shifted systematically from trial to trial. When successive stimuli were from the same category, the representation of that category was pulled toward the exemplar from the previous trial. When successive stimuli were from different categories, the representations of the neighbouring categories were pushed from the category of the initial stimulus. We conclude that accounts of categorization and identification must accommodate both assimilation and contrast as a function of trial-to-trial shifts in representation.