ArticleScientific reports2022
Symmetry as a grouping cue for numerosity perception.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
9 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Emotional states affect the degree of duration distortion more than distortion direction: a meta-analytic research.Psychological research · 2025Pooled it
- Perceptual grouping, not covert attention, drives the connectedness effect in the ANS.Psychological research · 2026Article
- From shape to number: Shape-from-dots homogeneity boosts groupitizing enumeration.Psychonomic bulletin & review · 2025Article
- Neural mechanisms of symmetry perception: hemispheric specialization and the impact of noise on reflection symmetry detection.Frontiers in neuroscience · 2025Article
- "Groupitizing": A Visuo-Spatial and Arithmetic Phenomenon.Open mind : discoveries in cognitive science · 2025Article
- Feature-selective adaptation of numerosity perception.Proceedings. Biological sciences · 2025Article
- The interplay between spatial and non-spatial grouping cues over approximate number perception.Attention, perception & psychophysics · 2024Article
- The symmetry-induced numerosity illusion depends on visual attention.Scientific reports · 2023Article
- Autistic-Like Traits in Members of the General Population and Mate Retention Tactics: The Mediation of Attachment Styles and Reproductive Strategies.Evolutionary psychology : an international journal of evolutionary approaches to psychology and behaviorArticle
Corrections and comments
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Authors and funding
5 authors.
Funding
Abstract
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 current study, we investigated how symmetry affects the ability to rapidly estimate the number of objects (numerosity). Participants judged the numerosity of asymmetric or symmetric arrays of various numerosities. The results show that the numerosity of symmetrical arrays was significantly underestimated at low numerosities, but the effect was greatly reduced at higher numerosities. Adding an additional axis of symmetry (double symmetry) further reduced perceived numerosity. The magnitude of the symmetry-driven underestimation was inversely correlated with autistic personality traits, consistent with previous work associating autistic traits with perceptual grouping. Overall, these results support the idea that perceived numerosity relies on object segmentation and grouping cues, with symmetry playing a key role.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.