Does crowding predict conjunction search? An individual differences approach

IF 1.5 4区 心理学 Q4 NEUROSCIENCES Vision Research Pub Date : 2024-01-09 DOI:10.1016/j.visres.2023.108342
Inês S. Veríssimo , Zachary Nudelman , Christian N.L. Olivers
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Abstract

Searching for objects in the visual environment is an integral part of human behavior. Most of the information used during such visual search comes from the periphery of our vision, and understanding the basic mechanisms of search therefore requires taking into account the inherent limitations of peripheral vision. Our previous work using an individual differences approach has shown that one of the major factors limiting peripheral vision (crowding) is predictive of single feature search, as reflected in response time and eye movement measures. Here we extended this work, by testing the relationship between crowding and visual search in a conjunction-search paradigm. Given that conjunction search involves more fine-grained discrimination and more serial behavior, we predicted it would be strongly affected by crowding. We tested sixty participants with regard to their sensitivity to both orientation and color-based crowding (as measured by critical spacing) and their efficiency in searching for a color/orientation conjunction (as indicated by manual response times and eye movements). While the correlations between the different crowding tasks were high, the correlations between the different crowding measures and search performance were relatively modest, and no higher than those previously observed for single-feature search. Instead, observers showed very strong color selectivity during search. The results suggest that conjunction search behavior relies more on top-down guidance (here by color) and is therefore relatively less determined by individual differences in sensory limitations as caused by crowding.

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拥挤会预测会合搜索吗?个体差异法
在视觉环境中搜索物体是人类行为不可分割的一部分。在这种视觉搜索过程中使用的大部分信息都来自我们的外围视觉,因此,要了解搜索的基本机制,就必须考虑到外围视觉的固有局限性。我们之前使用个体差异方法进行的研究表明,限制周边视觉的主要因素之一(拥挤)对单一特征搜索具有预测作用,这反映在反应时间和眼动测量上。在这里,我们扩展了这项工作,在联觉搜索范式中测试了拥挤与视觉搜索之间的关系。鉴于联觉搜索涉及更精细的辨别和更多的序列行为,我们预测它会受到拥挤的强烈影响。我们测试了六十名参与者对基于方向和颜色的拥挤的敏感度(以临界间距来衡量),以及他们搜索颜色/方向连线的效率(以手动反应时间和眼球运动来衡量)。虽然不同拥挤任务之间的相关性很高,但不同拥挤度量与搜索表现之间的相关性相对较低,并不高于之前在单特征搜索中观察到的相关性。相反,观察者在搜索过程中表现出很强的颜色选择性。这些结果表明,会合搜索行为更多地依赖于自上而下的引导(这里是通过颜色),因此相对较少受拥挤造成的感官限制的个体差异的影响。
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来源期刊
Vision Research
Vision Research 医学-神经科学
CiteScore
3.70
自引率
16.70%
发文量
111
审稿时长
66 days
期刊介绍: Vision Research is a journal devoted to the functional aspects of human, vertebrate and invertebrate vision and publishes experimental and observational studies, reviews, and theoretical and computational analyses. Vision Research also publishes clinical studies relevant to normal visual function and basic research relevant to visual dysfunction or its clinical investigation. Functional aspects of vision is interpreted broadly, ranging from molecular and cellular function to perception and behavior. Detailed descriptions are encouraged but enough introductory background should be included for non-specialists. Theoretical and computational papers should give a sense of order to the facts or point to new verifiable observations. Papers dealing with questions in the history of vision science should stress the development of ideas in the field.
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