ArticleJournal of vision2021
The dynamics of grouping-induced biases in apparent numerosity revealed by a continuous tracking technique.
Article in Journal of vision, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Continuous tracking of audiovisual motion.Journal of vision · 2025Article
- Measuring spatial and temporal properties of visual crowding using continuous psychophysics.Journal of vision · 2025Article
- Continuous psychophysics: past, present, future.Trends in cognitive sciences · 2025Review
- Investigating cross-orientation inhibition with continuous tracking.Journal of vision · 2024Article
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Authors and funding
3 authors.
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Abstract
Connecting pairs of items causes robust underestimation of the numerosity of an ensemble, presumably by invoking grouping mechanisms. Here we asked whether this underestimation in numerosity judgments could be revealed and further explored by continuous tracking, a newly developed technique that allows for fast and efficient data acquisition and monitors the dynamics of the responses. Participants continuously reproduced the perceived numerosity of a cloud of dots by moving a cursor along a number line, while the number of dots and the proportion connected by lines varied over time following two independent random walks. The technique was robust and efficient, and correlated well with results obtained with a standard psychophysics task. Connecting objects with lines caused an underestimation of approximately 15% during tracking, agreeing with previous studies. The response to the lines was slower than the response to the physical numerosity, with a delay of approximately 150 ms, suggesting that this extra time is necessary for processing the grouping effect.
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