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Contributions of ensemble perception to outlier representation precision
Attention, Perception, & Psychophysics ( IF 1.7 ) Pub Date : 2021-03-16 , DOI: 10.3758/s13414-021-02270-9
Burcu Avci , Aysecan Boduroglu

It is known that the visual system can efficiently extract mean and variance information, facilitating the detection of outliers. However, no research to date has directly investigated whether ensemble perception mechanisms contribute to outlier representation precision. We specifically were interested in how the distinctiveness of outliers impacts their precision. Across two experiments, we compared how accurately viewers represented the orientation of spatial outliers that varied in distinctiveness and found that increased outlier distinctiveness resulted in greater precision. Based on comparisons of our data to simulations reflecting particular selective strategies, we eliminated the possibility that participants were selectively processing the outlier, at the expense of the ensemble. Thus, we argued that participants separately represented distinct outliers along with ensemble summaries of the remaining items in a display. We also found that outlier distinctiveness moderated the precision of how the remaining items were summarized. We discuss these findings in relation to computational capacity and constraints of ensemble perception mechanisms.



中文翻译:

整体感知对异常值表示精度的贡献

已知视觉系统可以有效地提取均值和方差信息,从而有助于检测异常值。但是,迄今为止,尚无直接研究整体感知机制是否有助于异常值表示精度的研究。我们特别对异常值的独特性如何影响其精度感兴趣。在两个实验中,我们比较了观察者如何准确地表示出具有不同特征的空间异常值的方向,并发现增加的异常值独特性会导致更高的精度。根据我们的数据与反映特定选择策略的模拟的比较,我们消除了参与者有选择地处理离群值的可能性,而这是以牺牲整体为代价的。因此,我们认为参与者分别代表了不同的离群值以及显示中其余项目的整体摘要。我们还发现,异常值的独特性降低了其余项目的汇总精度。我们讨论这些发现与整体感知机制的计算能力和约束有关。

更新日期:2021-03-17
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