Opin vísindi

Rapid learning of visual ensembles

Rapid learning of visual ensembles

Title: Rapid learning of visual ensembles
Author: Chetverikov, Andrey   orcid.org/0000-0003-2767-6310
Campana, Gianluca
Kristjansson, Arni   orcid.org/0000-0003-4168-4886
Date: 2017-02-28
Language: English
Scope: 21
University/Institute: Háskóli Íslands
University of Iceland
School: Heilbrigðisvísindasvið (HÍ)
School of Health Sciences (UI)
Department: Sálfræðideild (HÍ)
Faculty of Psychology (UI)
Series: Journal of Vision;17(2)
ISSN: 1534-7362
DOI: 10.1167/17.2.21
Subject: Nám; Sjónskynjun; Tilraunir
URI: https://hdl.handle.net/20.500.11815/288

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Andrey Chetverikov, Gianluca Campana, Árni Kristjánsson; Rapid learning of visual ensembles. Journal of Vision 2017;17(2):21. doi: 10.1167/17.2.21.


We recently demonstrated that observers are capable of encoding not only summary statistics, such as mean and variance of stimulus ensembles, but also the shape of the ensembles. Here, for the first time, we show the learning dynamics of this process, investigate the possible priors for the distribution shape, and demonstrate that observers are able to learn more complex distributions, such as bimodal ones. We used speeding and slowing of response times between trials (intertrial priming) in visual search for an oddly oriented line to assess internal models of distractor distributions. Experiment 1 demonstrates that two repetitions are sufficient for enabling learning of the shape of uniform distractor distributions. In Experiment 2, we compared Gaussian and uniform distractor distributions, finding that following only two repetitions Gaussian distributions are represented differently than uniform ones. Experiment 3 further showed that when distractor distributions are bimodal (with a 30° distance between two uniform intervals), observers initially treat them as uniform, and only with further repetitions do they begin to treat the distributions as bimodal. In sum, observers do not have strong initial priors for distribution shapes and quickly learn simple ones but have the ability to adjust their representations to more complex feature distributions as information accumulates with further repetitions of the same distractor distribution.


The data from the experiments reported in this paper is available at https://osf.io/3apcv/.


This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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