Robust sampling of decision information during perceptual choice
| Autor: | Jan Balaguer, Hildward Vandormael, Christopher Summerfield, Santiago Herce Castañón, Vickie Li |
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| Rok vydání: | 2017 |
| Předmět: |
Male
Value (ethics) Eye Movements genetic structures Computer science media_common.quotation_subject Decision Making Sample (statistics) Choice Behavior 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Perception Humans Learning 0501 psychology and cognitive sciences media_common Visual search Multidisciplinary business.industry 05 social sciences Contrast (statistics) Biological Sciences Gaze Saccadic masking Preference Visual Perception Female Artificial intelligence business 030217 neurology & neurosurgery Cognitive psychology |
| Zdroj: | Proceedings of the National Academy of Sciences. 114:2771-2776 |
| ISSN: | 1091-6490 0027-8424 |
| Popis: | Humans move their eyes to gather information about the visual world. However, saccadic sampling has largely been explored in paradigms that involve searching for a lone target in a cluttered array or natural scene. Here, we investigated the policy that humans use to overtly sample information in a perceptual decision task that required information from across multiple spatial locations to be combined. Participants viewed a spatial array of numbers and judged whether the average was greater or smaller than a reference value. Participants preferentially sampled items that were less diagnostic of the correct answer ("inlying" elements; that is, elements closer to the reference value). This preference to sample inlying items was linked to decisions, enhancing the tendency to give more weight to inlying elements in the final choice ("robust averaging"). These findings contrast with a large body of evidence indicating that gaze is directed preferentially to deviant information during natural scene viewing and visual search, and suggest that humans may sample information "robustly" with their eyes during perceptual decision-making. |
| Databáze: | OpenAIRE |
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