ArticleHuman brain mapping2022
Groupitizing modifies neural coding of numerosity.
Article in Human brain mapping, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
- From shape to number: Shape-from-dots homogeneity boosts groupitizing enumeration.Psychonomic bulletin & review · 2025Article
- Distinct neural representational geometries of numerosity in early visual and association regions across visual streams.Communications biology · 2025Article
- Feature-selective adaptation of numerosity perception.Proceedings. Biological sciences · 2025Article
- "Groupitizing": A Visuo-Spatial and Arithmetic Phenomenon.Open mind : discoveries in cognitive science · 2025Article
- Inter-individual, hemispheric and sex variability of brain activations during numerosity processing.Brain structure & function · 2024Article
- Neurocognitive Assessment of Mathematics-Related Capacities in Neurosurgical Patients.Brain sciences · 2024Article
- Article
- EEG signature of grouping strategies in numerosity perception.Frontiers in neuroscience · 2023Article
- The role of non-numerical information in the perception of temporal numerosity.Frontiers in psychology · 2023Article
- Symmetry as a grouping cue for numerosity perception.Scientific reports · 2022Article
- Unimpaired groupitizing in children and adolescents with dyscalculia.Scientific reports · 2022Article
- Groupitizing modifies neural coding of numerosity.Human brain mapping · 2022Article
- Untypical Contrast Normalization Explains the "Weak Outnumber Strong" Numerosity Illusion.Frontiers in human neuroscience · 2022Article
- Is number a primary perceptual attribute?i-PerceptionArticle
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Authors and funding
6 authors.
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Abstract
Numerical estimation of arrays of objects is faster and more accurate when items can be clustered into groups, a phenomenon termed "groupitizing." Grouping can facilitate segregation into subitizable "chunks," each easily estimated, then summed. The current study investigates whether spatial grouping of arrays drives specific neural responses during numerical estimation, reflecting strategies such as exact calculation and fact retrieval. Fourteen adults were scanned with fMRI while estimating either the numerosity or shape of arrays of items, either randomly distributed or spatially grouped. Numerosity estimation of both classes of stimuli elicited common activation of a right lateralized frontoparietal network. Grouped stimuli additionally recruited regions in the left hemisphere and bilaterally in the angular gyrus. Multivariate pattern analysis showed that classifiers trained with the pattern of neural activations read out from parietal regions, but not from the primary visual areas, can decode different numerosities both within and across spatial arrangements. The behavioral numerical acuity correlated with the decoding performance of the parietal but not with occipital regions. Overall, this experiment suggests that the estimation of grouped stimuli relies on the approximate number system for numerosity estimation, but additionally recruits regions involved in calculation.
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