Emergent features in the crowding zone: When target-flanker grouping surmounts crowding.

Melnik, Natalia; Coates, Daniel R.; Sayim, Bilge

Document type :

Article dans une revue scientifique

DOI :

10.1167/18.9.19

PMID :

30372753

Permalink :

http://hdl.handle.net/20.500.12210/103118

Title :

Emergent features in the crowding zone: When target-flanker grouping surmounts crowding.

Author(s) :

Melnik, Natalia [Auteur]
Universität Bern = University of Bern = Université de Berne [UNIBE]
Coates, Daniel R. [Auteur]
University of Houston
Universität Bern = University of Bern = Université de Berne [UNIBE]
Sayim, Bilge [Auteur]
Laboratoire Sciences Cognitives et Sciences Affectives - UMR 9193 [SCALab]
Universität Bern = University of Bern = Université de Berne [UNIBE]

Journal title :

Journal of Vision

Volume number :

Publication date :

2018-09-04

HAL domain(s) :

Sciences cognitives

English abstract : [en]

Crowding is the impairment of target identification when the target is surrounded by nearby flankers. Two hallmarks of crowding are that it is stronger when the flankers are close to the target and when the target strongly ...
Show more >Crowding is the impairment of target identification when the target is surrounded by nearby flankers. Two hallmarks of crowding are that it is stronger when the flankers are close to the target and when the target strongly groups with the flankers. Here we show the opposite of both. A chevron target (pointing up or down) was presented at 8° eccentricity in the right visual field. It was surrounded by four flankers. Three of the flankers varied (pointing left or right). The fourth, the critical flanker (CF), was fixed in one orientation (left, right, up, down), yielding different configurations with the target. The CF's distance to the target was varied. Target identification depended strongly on the distance and the orientation of the CF. Remarkably, when the target and the CF grouped into a good configuration and elicited an emergent feature, performance was high if the CF was close to the target. This effect was particularly strong when participants were informed about the different CF-target configurations before the experiment. Reducing crowding and grouping by asynchronous presentation of the CF and the other items abolished the effect. When participants reported the entire configuration of the CF and the target, performance rapidly decreased with increasing spacing when the CF and the target were different but not when they were the same, indicating different spatial extents of the corresponding grouping processes. Our results show that the features emerging from the configurations of the target and a flanker strongly modulate crowding. Strong target-flanker grouping can benefit performanceShow less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
CHU Lille

Collections :

Sciences Cognitives et Sciences Affectives (SCALab) - UMR 9193

Research team(s) :

Équipe Action, Vision et Apprentissage (AVA)

Submission date :

2024-01-18T08:24:32Z
2024-01-26T10:33:49Z

Version	Link	Modification date
2	20.500.12210/103118*	2024-01-26T10:31:23Z
1	20.500.12210/103118.1	2024-01-18T08:24:32Z

Emergent features in the crowding zone: ...

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Emergent features in the crowding zone: ... BibTeX CSV Excel RIS

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Emergent features in the crowding zone: ...

BibTeX

CSV

Excel

RIS