Visual search asymmetry with uncertain targets
Visual search asymmetry with uncertain targets
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DOI：
10.1037/0096-1523.31.6.1274
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发表时间：
2005-12-01
影响因子：
2.1
通讯作者：
Inoue, T
中科院分区：
文献类型：
--
作者：
Saiki, J;Koike, T;Inoue, T
搜索不对称的潜在机制仍然是未知的。许多计算模型假设自上而下的目标定义功能的选择作为一个关键因素。这个特征选择帐户意味着，和其他理论隐含地假设，预定义的目标身份是必要的搜索不对称。作者使用没有预定义目标的单例搜索任务测试了特征选择帐户的有效性。参与者进行了一个目标定义和一个单例搜索任务与一个圆圈（O）和一个圆圈与一个垂直的酒吧（Q）。搜索不对称观察到在这两个任务几乎相同的幅度。这些结果并不是由于逐个试验的特征选择，因为即使在目标完全不可预测的情况下，搜索不对称也会持续存在。单例搜索的不对称性也观察到更复杂的刺激，汉字字符。这些结果表明，特征选择是不必要的搜索不对称性，他们施加了重要的限制，目前的视觉搜索理论。
The underlying mechanism of search asymmetry is still unknown. Many computational models postulate top-down selection of target-defining features as a crucial factor. This feature selection account implies, and other theories implicitly assume, that predefined target identity is necessary for search asymmetry. The authors tested the validity of the feature selection account using a singleton search task without a predefined target. Participants conducted a target-defined and a singleton search task with a circle (O) and a circle with a vertical bar (Q). Search asymmetry was observed in both tasks with almost identical magnitude. The results were not due to trial-by-trial feature selection, because search asymmetry persisted even when the target was completely unpredictable. Asymmetry in the singleton search was also observed with more complex stimuli, Kanji characters. These results suggest that feature selection is not necessary for search asymmetry, and they impose important constraints on current visual search theories.