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Article
Open AccessThe role of motor effort on the sensorimotor number system
The integration of numerical information with motor processes has emerged as a fascinating area of investigation in both animal and human cognition. The interest in a sensorimotor number system has recently ge...
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Article
Open AccessTop-down determinants of the numerosity–time interaction
Previous studies have reported that larger visual stimuli are perceived as lasting longer than smaller ones. However, this effect disappears when participants provide a qualitative judgment, by stating whether...
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Article
Open AccessThe symmetry-induced numerosity illusion depends on visual attention
Symmetry is an important and strong cue we rely on to organize the visual world. Although it is at the basis of objects segmentation in a visual scene, it can sometimes bias our perception. When asked to discr...
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Article
Open AccessSymmetry as a grou** cue for numerosity perception
To estimate the number of objects in an image, each element needs to be segregated as a single unit. Several principles guide the process of element identification, one of the strongest being symmetry. In the ...
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Article
Open AccessUnimpaired groupitizing in children and adolescents with dyscalculia
When asked to estimate the number of items in the visual field, neurotypical adults are more precise and rapid if the items are clustered into subgroups compared to when they are randomly distributed. It has b...
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Article
Open AccessAuditory time thresholds in the range of milliseconds but not seconds are impaired in ADHD
The literature on time perception in individuals with ADHD is extensive but inconsistent, probably reflecting the use of different tasks and performances indexes. A sample of 40 children/adolescents (20 with A...
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Article
Open AccessPerception of geometric sequences and numerosity both predict formal geometric competence in primary school children
While most animals have a sense of number, only humans have developed symbolic systems to describe and organize mathematical knowledge. Some studies suggest that human arithmetical knowledge may be rooted in a...
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Article
Open AccessGrou** strategies in number estimation extend the subitizing range
When asked to estimate the number of items in a visual array, educated adults and children are more precise and rapid if the items are clustered into small subgroups rather than randomly distributed. This phen...
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Article
Open Access“Groupitizing”: a strategy for numerosity estimation
Previous work has shown that when arrays of objects are grouped within clusters, participants can enumerate their numerosity more rapidly than when objects are randomly scattered, a phenomenon termed “groupiti...
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Article
Open AccessHigher attentional costs for numerosity estimation at high densities
Humans can estimate numerosity over a large range, but the precision with which they do so varies considerably over that range. For very small sets, within the subitizing range of up to about four items, estimati...
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Article
Open AccessIndependent adaptation mechanisms for numerosity and size perception provide evidence against a common sense of magnitude
How numerical quantity is processed is a central issue for cognition. On the one hand the “number sense theory” claims that numerosity is perceived directly, and may represent an early precursor for acquisitio...
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Article
Open AccessSpontaneous perception of numerosity in humans
Humans, including infants, and many other species have a capacity for rapid, nonverbal estimation of numerosity. However, the mechanisms for number perception are still not clear; some maintain that the system...
