Strategy variability in numerosity comparison task: a study in young and older adults

Roquet, Angélique; Lemaire, Patrick

doi:10.1515/psych-2018-0011

Cited by 17 publications

(25 citation statements)

References 64 publications

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“…It is thus still possible that a weighting (4) or normalization of the various magnitude information (2) occurs at later processing stages while performing a numerosity task (e.g., nonsymbolic estimation or comparison tasks). Recent studies support the view that such interactions are deliberate, and strategic, rather than perceptual (40). In other words, the current results do not support the hypothesis that the number of items in a visual scene is initially processed through an active weighting of continuous magnitudes at that early processing stage.…”

Section: Discussioncontrasting

confidence: 99%

The neural signature of numerosity by separating numerical and continuous magnitude extraction in visual cortex with frequency-tagged EEG

Rinsveld

Guillaumé

Kohler

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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The ability to handle approximate quantities, or number sense, has been recurrently linked to mathematical skills, although the nature of the mechanism allowing to extract numerical information (i.e., numerosity) from environmental stimuli is still debated. A set of objects is indeed not only characterized by its numerosity but also by other features, such as the summed area occupied by the elements, which often covary with numerosity. These intrinsic relations between numerosity and nonnumerical magnitudes led some authors to argue that numerosity is not independently processed but extracted through a weighting of continuous magnitudes. This view cannot be properly tested through classic behavioral and neuroimaging approaches due to these intrinsic correlations. The current study used a frequency-tagging EEG approach to separately measure responses to numerosity as well as to continuous magnitudes. We recorded occipital responses to numerosity, total area, and convex hull changes but not to density and dot size. We additionally applied a model predicting primary visual cortex responses to the set of stimuli. The model output was closely aligned with our electrophysiological data, since it predicted discrimination only for numerosity, total area, and convex hull. Our findings thus demonstrate that numerosity can be independently processed at an early stage in the visual cortex, even when completely isolated from other magnitude changes. The similar implicit discrimination for numerosity as for some continuous magnitudes, which correspond to basic visual percepts, shows that both can be extracted independently, hence substantiating the nature of numerosity as a primary feature of the visual scene. numerical cognition | numerosity extraction | fast periodic visual stimulation | quantities | nonsymbolic mathematical abilities

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Section: Discussioncontrasting

confidence: 99%

The neural signature of numerosity by separating numerical and continuous magnitude extraction in visual cortex with frequency-tagged EEG

Rinsveld

Guillaumé

Kohler

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

“…The lack of systematicity likely indexed the flexible strategic use of covarying dimensions and would reflect the deliberate use of non-target visual information to compare the target dimension. This interpretation is consistent with the observation that adults can adaptively use all available information to perform numerical comparison judgements (Roquet & Lemaire, 2019). Performance in comparison tasks is thus affected by irrelevant covarying cues, irrespective of the numerical aspect.…”

Section: Discussionsupporting

confidence: 91%

Mutual influences between numerical and non-numerical quantities in comparison tasks

Hendryckx

Guillaumé

Beuel

et al. 2021

Quarterly Journal of Experimental Psychology

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Humans possess a numerical intuition that allows them to manipulate large non-symbolic quantities. This ability has been broadly assessed with the help of number comparison tasks involving simultaneously displayed arrays. Many authors pointed out that the manipulation (or the lack thereof) of non-numerical features deeply impacts performance in these tasks, but the specific nature of this influence is not clear. This study investigates the interaction between numerical and non-numerical quantity judgement tasks. Adult participants performed five distinct comparison tasks, each based on a target dimension: numerosity, total area, dot size, convex hull, and mean occupancy. We manipulated the relation between the target and the other dimensions to measure their respective influence on task performance. Results showed that total area and convex hull substantially affected numerosity comparisons. The number of dots conversely acted as an informative dimension when participants had to make a decision based on the total area or the convex hull. Our results illustrate that adults flexibly use non-target dimensions as visual cues to perform comparison judgements. Overall, this suggests that the influence found in numerical comparison tasks is explicit and deliberate rather than due to implicit visual integration processes.

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“…The lack of systematicity likely indexed the flexible strategic use of covarying dimensions and would reflect the Mutual influences between numerical and non-numerical quantities deliberate use of non-target visual information to compare the target dimension. This interpretation is consistent with the observation that adults can adaptively use all available information to perform numerical comparison judgments (Roquet & Lemaire, 2019).…”

Section: Discussionsupporting

confidence: 90%

Mutual influences between numerical and non-numerical quantities in comparison tasks

Hendryckx¹,

Guillaumé²,

Beuel³

et al. 2020

Preprint

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Humans possess a numerical intuition that allows them to manipulate large non-symbolic quantities. This ability has been broadly assessed with the help of number comparison tasks involving simultaneously displayed arrays. Many authors pointed out that the manipulation (or the lack thereof) of non-numerical features deeply impacts performance in these tasks, but the specific nature of this influence is not clear. The current study investigates the interaction between numerical and non-numerical quantity judgment tasks. Adult participants performed five distinct comparison tasks, each based on a target dimension: numerosity, total area, dot size, convex hull, and mean occupancy. We manipulated the relation between the target and the other dimensions to measure their respective influence on task performance. Results showed that total area and convex hull substantially affected numerosity comparisons. The number of dots conversely acted as an informative dimension when participants had to make a decision based on the total area or the convex hull. Our results illustrate that adults flexibly use non-target dimensions as visual cues to perform comparison judgments. Overall, this suggests that the influence found in numerical comparison tasks is explicit and deliberate rather than due to implicit visual integration processes.

show abstract

Strategy variability in numerosity comparison task: a study in young and older adults

Cited by 17 publications

References 64 publications

The neural signature of numerosity by separating numerical and continuous magnitude extraction in visual cortex with frequency-tagged EEG

The neural signature of numerosity by separating numerical and continuous magnitude extraction in visual cortex with frequency-tagged EEG

Mutual influences between numerical and non-numerical quantities in comparison tasks

Mutual influences between numerical and non-numerical quantities in comparison tasks

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