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Impaired Numerical Ability Affects Supra-Second Time Estimation

Cappelletti, M; Gilaie-Dotan, S; Rees, G; Butterworth, B; (2014) Impaired Numerical Ability Affects Supra-Second Time Estimation. Timing & Time Perception , 2 (2) 169 - 187. 10.1163/22134468-00002026. Green open access

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Abstract

It has been suggested that the human ability to process number and time both rely on common magnitude mechanisms, yet for time this commonality has mainly been investigated in the sub-second rather than longer time ranges. Here we examined whether number processing is associated with timing in time ranges greater than a second. Specifically, we tested long duration estimation abilities in adults with a developmental impairment in numerical processing (dyscalculia), reasoning that any such timing impairment co-occurring with dyscalculia may be consistent with joint mechanisms for time estimation and number processing. Dyscalculics and age-matched controls were tested on supra-second temporal estimation (12 s), a difficulty-matched non-temporal control task, as well as mathematical abilities. Consistent with our hypothesis, dyscalculics were significantly impaired in supra-second duration estimation but not in the control task. Furthermore, supra-second timing ability positively correlated with mathematical proficiency. All participants reported that they used counting to estimate time, although no specific instructions were given with respect to counting. These results suggest that numerical processing and supra-second temporal estimation share common mechanisms. However, since this conclusion is also based on subjective observations, further work needs to be done to determine whether mathematical impairment co-occurs with supra-second time estimation impairment when counting is not involved in and is objectively controlled for during supra-second timing. We hypothesize that counting, that does not develop normally in dyscalculics, might underlie and adversely affect dyscalculics’ supra-second time estimation performance, rather than an impairment of a magnitude mechanism or the internal clock pacemaker.

Type: Article
Title: Impaired Numerical Ability Affects Supra-Second Time Estimation
Open access status: An open access version is available from UCL Discovery
DOI: 10.1163/22134468-00002026
Publisher version: http://dx.doi.org/10.1163/22134468-00002026
Additional information: © Gilaie-Dotan et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) License
Keywords: Dyscalculia; time discrimination; chronometric counting; time estimation; magnitude;
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1443298
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