Flexible time course of spatial frequency use during scene categorization

Abstract Human observers can quickly and accurately categorize scenes. This remarkable ability is related to the usage of information at different spatial frequencies (SFs) following a coarse-to-fine pattern: Low SFs, conveying coarse layout information, are thought to be used earlier than high SFs,...

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Autores principales:	Sandro L. Wiesmann, Laurent Caplette, Verena Willenbockel, Frédéric Gosselin, Melissa L.-H. Võ
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/c03681be0cd34ca89a39931a707ce9c9
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spelling	oai:doaj.org-article:c03681be0cd34ca89a39931a707ce9c92021-12-02T15:23:16ZFlexible time course of spatial frequency use during scene categorization10.1038/s41598-021-93252-22045-2322https://doaj.org/article/c03681be0cd34ca89a39931a707ce9c92021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93252-2https://doaj.org/toc/2045-2322Abstract Human observers can quickly and accurately categorize scenes. This remarkable ability is related to the usage of information at different spatial frequencies (SFs) following a coarse-to-fine pattern: Low SFs, conveying coarse layout information, are thought to be used earlier than high SFs, representing more fine-grained information. Alternatives to this pattern have rarely been considered. Here, we probed all possible SF usage strategies randomly with high resolution in both the SF and time dimensions at two categorization levels. We show that correct basic-level categorizations of indoor scenes are linked to the sampling of relatively high SFs, whereas correct outdoor scene categorizations are predicted by an early use of high SFs and a later use of low SFs (fine-to-coarse pattern of SF usage). Superordinate-level categorizations (indoor vs. outdoor scenes) rely on lower SFs early on, followed by a shift to higher SFs and a subsequent shift back to lower SFs in late stages. In summary, our results show no consistent pattern of SF usage across tasks and only partially replicate the diagnostic SFs found in previous studies. We therefore propose that SF sampling strategies of observers differ with varying stimulus and task characteristics, thus favouring the notion of flexible SF usage.Sandro L. WiesmannLaurent CapletteVerena WillenbockelFrédéric GosselinMelissa L.-H. VõNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sandro L. Wiesmann Laurent Caplette Verena Willenbockel Frédéric Gosselin Melissa L.-H. Võ Flexible time course of spatial frequency use during scene categorization
description	Abstract Human observers can quickly and accurately categorize scenes. This remarkable ability is related to the usage of information at different spatial frequencies (SFs) following a coarse-to-fine pattern: Low SFs, conveying coarse layout information, are thought to be used earlier than high SFs, representing more fine-grained information. Alternatives to this pattern have rarely been considered. Here, we probed all possible SF usage strategies randomly with high resolution in both the SF and time dimensions at two categorization levels. We show that correct basic-level categorizations of indoor scenes are linked to the sampling of relatively high SFs, whereas correct outdoor scene categorizations are predicted by an early use of high SFs and a later use of low SFs (fine-to-coarse pattern of SF usage). Superordinate-level categorizations (indoor vs. outdoor scenes) rely on lower SFs early on, followed by a shift to higher SFs and a subsequent shift back to lower SFs in late stages. In summary, our results show no consistent pattern of SF usage across tasks and only partially replicate the diagnostic SFs found in previous studies. We therefore propose that SF sampling strategies of observers differ with varying stimulus and task characteristics, thus favouring the notion of flexible SF usage.
format	article
author	Sandro L. Wiesmann Laurent Caplette Verena Willenbockel Frédéric Gosselin Melissa L.-H. Võ
author_facet	Sandro L. Wiesmann Laurent Caplette Verena Willenbockel Frédéric Gosselin Melissa L.-H. Võ
author_sort	Sandro L. Wiesmann
title	Flexible time course of spatial frequency use during scene categorization
title_short	Flexible time course of spatial frequency use during scene categorization
title_full	Flexible time course of spatial frequency use during scene categorization
title_fullStr	Flexible time course of spatial frequency use during scene categorization
title_full_unstemmed	Flexible time course of spatial frequency use during scene categorization
title_sort	flexible time course of spatial frequency use during scene categorization
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/c03681be0cd34ca89a39931a707ce9c9
work_keys_str_mv	AT sandrolwiesmann flexibletimecourseofspatialfrequencyuseduringscenecategorization AT laurentcaplette flexibletimecourseofspatialfrequencyuseduringscenecategorization AT verenawillenbockel flexibletimecourseofspatialfrequencyuseduringscenecategorization AT fredericgosselin flexibletimecourseofspatialfrequencyuseduringscenecategorization AT melissalhvo flexibletimecourseofspatialfrequencyuseduringscenecategorization
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Flexible time course of spatial frequency use during scene categorization

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