The anisotropic field of ensemble coding

Abstract Human observers can accurately estimate statistical summaries from an ensemble of multiple stimuli, including the average size, hue, and direction of motion. The efficiency and speed with which statistical summaries are extracted suggest an automatic mechanism of ensemble coding that operat...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	David Pascucci, Nadia Ruethemann, Gijs Plomp
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/37ec90d3c3a946338f61f989aca6b188
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:37ec90d3c3a946338f61f989aca6b188
record_format	dspace
spelling	oai:doaj.org-article:37ec90d3c3a946338f61f989aca6b1882021-12-02T15:51:14ZThe anisotropic field of ensemble coding10.1038/s41598-021-87620-12045-2322https://doaj.org/article/37ec90d3c3a946338f61f989aca6b1882021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87620-1https://doaj.org/toc/2045-2322Abstract Human observers can accurately estimate statistical summaries from an ensemble of multiple stimuli, including the average size, hue, and direction of motion. The efficiency and speed with which statistical summaries are extracted suggest an automatic mechanism of ensemble coding that operates beyond the capacity limits of attention and memory. However, the extent to which ensemble coding reflects a truly parallel and holistic mode of processing or a non-uniform and biased integration of multiple items is still under debate. In the present work, we used a technique, based on a Spatial Weighted Average Model (SWM), to recover the spatial profile of weights with which individual stimuli contribute to the estimated average during mean size adjustment tasks. In a series of experiments, we derived two-dimensional SWM maps for ensembles presented at different retinal locations, with different degrees of dispersion and under different attentional demands. Our findings revealed strong spatial anisotropies and leftward biases in ensemble coding that were organized in retinotopic reference frames and persisted under attentional manipulations. These results demonstrate an anisotropic spatial contribution to ensemble coding that could be mediated by the differential activation of the two hemispheres during spatial processing and scene encoding.David PascucciNadia RuethemannGijs PlompNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q David Pascucci Nadia Ruethemann Gijs Plomp The anisotropic field of ensemble coding
description	Abstract Human observers can accurately estimate statistical summaries from an ensemble of multiple stimuli, including the average size, hue, and direction of motion. The efficiency and speed with which statistical summaries are extracted suggest an automatic mechanism of ensemble coding that operates beyond the capacity limits of attention and memory. However, the extent to which ensemble coding reflects a truly parallel and holistic mode of processing or a non-uniform and biased integration of multiple items is still under debate. In the present work, we used a technique, based on a Spatial Weighted Average Model (SWM), to recover the spatial profile of weights with which individual stimuli contribute to the estimated average during mean size adjustment tasks. In a series of experiments, we derived two-dimensional SWM maps for ensembles presented at different retinal locations, with different degrees of dispersion and under different attentional demands. Our findings revealed strong spatial anisotropies and leftward biases in ensemble coding that were organized in retinotopic reference frames and persisted under attentional manipulations. These results demonstrate an anisotropic spatial contribution to ensemble coding that could be mediated by the differential activation of the two hemispheres during spatial processing and scene encoding.
format	article
author	David Pascucci Nadia Ruethemann Gijs Plomp
author_facet	David Pascucci Nadia Ruethemann Gijs Plomp
author_sort	David Pascucci
title	The anisotropic field of ensemble coding
title_short	The anisotropic field of ensemble coding
title_full	The anisotropic field of ensemble coding
title_fullStr	The anisotropic field of ensemble coding
title_full_unstemmed	The anisotropic field of ensemble coding
title_sort	anisotropic field of ensemble coding
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/37ec90d3c3a946338f61f989aca6b188
work_keys_str_mv	AT davidpascucci theanisotropicfieldofensemblecoding AT nadiaruethemann theanisotropicfieldofensemblecoding AT gijsplomp theanisotropicfieldofensemblecoding AT davidpascucci anisotropicfieldofensemblecoding AT nadiaruethemann anisotropicfieldofensemblecoding AT gijsplomp anisotropicfieldofensemblecoding
_version_	1718385626568458240

The anisotropic field of ensemble coding

Ejemplares similares