Distractor–distractor interactions in visual search for oriented targets explain the increased difficulty observed in nonlinearly separable conditions.
Distractor–distractor interactions in visual search for oriented targets explain the increased difficulty observed in nonlinearly separable conditions.
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视觉搜索定向目标时的干扰因素与干扰因素的相互作用解释了在非线性可分离条件下观察到的难度增加。
DOI：
10.1037/xhp0000941
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Buetti, Simona
中科院分区：
文献类型：
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作者：
Xu, Zoe;Lleras, Alejandro;Shao, Yujie;Buetti, Simona
线性可分离性效应是指在特征搜索任务中观察到的搜索性能的好处，其中目标和分心特征沿着连续的特征维度变化：当特征空间中存在将分心特征与目标特征分开的边界时，搜索性能最佳。然而，分心物异质性在这种效应中所起的作用还不是很清楚。在这里，我们在Llera等人(2019)的一种新的预测程序的背景下重新检查了这种影响，该程序量化了分心异质性对搜索性能的影响。实验1A和1B测量了人们在同类搜索条件下的表现，即他们在一种类型的分心物中搜索目标。然后，在实验2和实验3中，使用在实验1A和B中观察到的参数来预测搜索时间，在实验2和实验3中，目标被呈现在包含两种类型的分心物的不同显示器中。结果表明，总方差的贡献率在95%~98%之间，不包括任何指标的线性可分性规则。结果表明，定向空间中的异质搜索是目标-干扰项相似度和项目间交互作用的函数。这项研究突出了预测过程的健壮性，并证明了该方法的普适性，以估计新的刺激类型的项目间交互作用。
The linear separability effect refers to a benefit in search performance observed in a feature-search task, where target and distractor features vary along a continuous feature dimension: Search performance is best when there is a boundary in feature space that separates the distractor features from the target feature. However, the role that distractor heterogeneity plays in this effect is not well understood. Here, we reexamined this effect in the context of a new predictive procedure from Lleras et al.(2019) that quantifies the impact of distractor heterogeneity on search performance. Experiments 1A and 1B measured people’s performance in homogeneous search conditions where they searched for the target among one type of distractor. The parameters observed in Experiments 1A and B were then used to predict search times in Experiments 2 and 3, where the target was presented in heterogeneous displays containing two types of distractors. The results show that total variance accounted for was 95% to 98%, without including any factor indexing the linear separability rule. The results demonstrate that heterogeneous search in orientation space is a function of target-distractor similarity and interitem interactions. The study highlights the robustness of the predictive procedure and demonstrates the generalizability of the method to estimate interitem interactions to new stimulus types.