Motor adaptation affects perception of time and numerosity

Burr, David; Anobile, Giovanni; Togoli, Irene; Domenici, Nicola; Arrighi, Roberto

doi:10.1167/19.10.164b

Cited by 4 publications

(2 citation statements)

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“…In this view, although the increase in cortical excitability to test stimulus may result from an increased adaptor-mediated alpha synchronization, the correlation with changes in numerical estimates suggests a genuine association with the encoding of numerical information. Accordingly, previous studies showed that underestimation of numerical sequences can be obtained also when the adaptation period is characterized by motor sequences lying within the theta range (Anobile et al, 2016;Burr et al, 2019).…”

Section: Discussionmentioning

confidence: 97%

Electrophysiological correlates of temporal numerosity adaptation

Grasso,

Petrizzo,

Coniglio

et al. 2024

Front. Neurosci.

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IntroductionMuch research has revealed the human visual system is capable to estimate numerical quantities, rapidly and reliably, in both the spatial and the temporal domain. This ability is highly susceptible to short-term plastic phenomena related to previous exposure to visual numerical information (i.e., adaptation). However, while determinants of spatial numerosity adaptation have been widely investigated, little is known about the neural underpinnings of short-term plastic phenomena related to the encoding of temporal numerical information. In the present study we investigated the electrophysiological correlates of temporal numerosity adaptation.MethodsParticipants were asked to estimate the numerosity of a test sequence of flashes after being exposed to either a high or low numerous adapting sequence. Behavioral results confirmed the expected underestimation of test stimulus when this was preceded by a high numerous sequence as compared to when preceded by a low numerous sequence.ResultsElectrophysiological data revealed that this behavior was tightly linked to the amplitude of the steady-state visual evoked (ssVEP) response elicited by the test stimulus. When preceded by a high numerous sequence, the test stimulus elicited larger ssVEP responses as compared to when preceded by a low numerous sequence with this pattern being robustly correlated with behavior. Finally, topographical maps showed that this difference was mostly evident across two antero-posterior distributed clusters of electrodes and correlated with changes in functional connectivity.DiscussionTaken together, our results suggest that visual plastic phenomena related to the encoding of temporal numerosity information reflect changes in rhythmic evoked activity that are likely related to long range communications between distinct brain regions.

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Section: Discussionmentioning

confidence: 97%

Electrophysiological correlates of temporal numerosity adaptation

Grasso,

Petrizzo,

Coniglio

et al. 2024

Front. Neurosci.

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“…Furthermore, it distinguishes the ANS from a "texture density system." This is a system which, unlike the ANS, enables organisms to discriminate sets that are too crowded to parse, and (thus) perceived as texture (Burr, Anobile, Togoli, Domenici, & Arrighi, 2019). Crucially, the texture density system's performance is not predicted by Weber's Law but by a psychophysically distinct square root law, revealing a marked difference in its signature limitations .…”

Section: The Ansmentioning

confidence: 99%

Numerosity, area-osity, object-osity? Oh my

Yousif

2021

Behav Brain Sci

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There is ongoing debate about whether number is perceived directly. Clarke and Beck suggest that what plagues this debate is a lack of shared understanding about what it means to perceive number in the first place. I agree. I argue that the perception of number is held to a different standard than, say, the perception of objecthood; considering this, I explore what it might mean for the number system to represent rational numbers.

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The number sense represents (rational) numbers

Clarke¹,

Beck²

2021

Behav Brain Sci

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On a now orthodox view, humans and many other animals possess a “number sense,” or approximate number system (ANS), that represents number. Recently, this orthodox view has been subject to numerous critiques that question whether the ANS genuinely represents number. We distinguish three lines of critique—the arguments from congruency, confounds, and imprecision—and show that none succeed. We then provide positive reasons to think that the ANS genuinely represents numbers, and not just non-numerical confounds or exotic substitutes for number, such as “numerosities” or “quanticals,” as critics propose. In so doing, we raise a neglected question: numbers of what kind? Proponents of the orthodox view have been remarkably coy on this issue. But this is unsatisfactory since the predictions of the orthodox view, including the situations in which the ANS is expected to succeed or fail, turn on the kind(s) of number being represented. In response, we propose that the ANS represents not only natural numbers (e.g. 7), but also non-natural rational numbers (e.g. 3.5). It does not represent irrational numbers (e.g. √2), however, and thereby fails to represent the real numbers more generally. This distances our proposal from existing conjectures, refines our understanding of the ANS, and paves the way for future research.

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Motor adaptation affects perception of time and numerosity

Cited by 4 publications

References 0 publications

Electrophysiological correlates of temporal numerosity adaptation

Electrophysiological correlates of temporal numerosity adaptation

Numerosity, area-osity, object-osity? Oh my

The number sense represents (rational) numbers

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