Color and Visual Search, Color Singletons

Martinović, Jasna; Hardman, Amanda

doi:10.1007/978-1-4419-8071-7_82

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Unlike simple color discrimination (for a discussion, see Martinovic et al. 2020 ), performance in a visual search task for color targets is influenced by categorical status ( Found and Muller 1996 ; for an overview, see Martinovic and Hardman 2016 ). Categories can also be used to set attentional guidance based on an element’s position in relation to the other colors in the display (e.g.…”

Section: Discussionmentioning

confidence: 99%

Division and spreading of attention across color

Martinovic,

Boyanova,

Andersen

2024

Cerebral Cortex

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Biological systems must allocate limited perceptual resources to relevant elements in their environment. This often requires simultaneous selection of multiple elements from the same feature dimension (e.g. color). To establish the determinants of divided attentional selection of color, we conducted an experiment that used multicolored displays with four overlapping random dot kinematograms that differed only in hue. We manipulated (i) requirement to focus attention to a single color or divide it between two colors; (ii) distances of distractor hues from target hues in a perceptual color space. We conducted a behavioral and an electroencephalographic experiment, in which each color was tagged by a specific flicker frequency and driving its own steady-state visual evoked potential. Behavioral and neural indices of attention showed several major consistencies. Concurrent selection halved the neural signature of target enhancement observed for single targets, consistent with an approximately equal division of limited resources between two hue-selective foci. Distractors interfered with behavioral performance in a context-dependent fashion but their effects were asymmetric, indicating that perceptual distance did not adequately capture attentional distance. These asymmetries point towards an important role of higher-level mechanisms such as categorization and grouping-by-color in determining the efficiency of attentional allocation in complex, multicolored scenes.

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Section: Discussionmentioning

confidence: 99%

Division and spreading of attention across color

Martinovic,

Boyanova,

Andersen

2024

Cerebral Cortex

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“…This unexpected finding implies that while CIELAB may be perceptually uniform, this does not guarantee in any way its uniformity in terms of attentional effects or categorical representativeness of different hues. Unlike simple colour discrimination (for a discussion, see Martinovic et al 2020), performance in a visual search task for colour targets is influenced by categorical status (Found and Muller 1996; for an overview, see Martinovic and Hardman 2016). Categories can also be used to set attentional guidance based on an element’s position in relation to the other colours in the display (e.g.…”

Section: Discussionmentioning

confidence: 99%

Division and Spreading of Attention across Colour

Martinović

Boyanova

Andersen

2023

Preprint

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Biological systems must allocate limited perceptual resources to relevant elements in their environment. In vision, this can be achieved by attending to a spatial location or a defining feature (e.g. colour). Spatial attention can be conceived as a spotlight in 2D space, whose focus can differ in breadth and concentration. Could attention to colour also function as a spotlight that highlights an area of colour space? We examined this in an experiment that used multicoloured displays with four overlapping random dot kinematograms (RDKs) that differed only in hue. We manipulated (1) requirement to focus attention to a single colour (red or green) or divide it between two colours (red and green); (2) distances of distractor hues from target hues. This resulted in three different colour contexts, which differed in proximity between targets and distractors. We conducted a behavioural and an electroencephalographic experiment, in which each colour was tagged by a specific flicker frequency and driving its own steady-state visual evoked potential. Behavioural and neural indices of attention showed several major consistencies. Concurrent selection of red and green reduced the efficiency of target enhancement and produced context-dependent distractor interference, consistent with a combination of two hue-selective spotlights of unchanged breadth but reduced concentration. This conceptual similarity in implementation of spatial and feature-based selection implies that attentional modulation of signals in biological systems is likely to be implemented using the same domain-general selective mechanisms, which are well-described with a spotlight metaphor.

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Literature Review on Intensive Supervision Orders: A Report Prepared for the Act Justice and Community Safety Directorate

Bartels

2014

SSRN Journal

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Color and Visual Search, Color Singletons

Cited by 3 publications

References 14 publications

Division and spreading of attention across color

Division and spreading of attention across color

Division and Spreading of Attention across Colour

Literature Review on Intensive Supervision Orders: A Report Prepared for the Act Justice and Community Safety Directorate

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