"How many" and "how much" dissociate in the parietal lobe

Bibliographic Details
Parent link:Cognition
Vol. 73.— 2015.— [P. 73-79]
Corporate Author: Национальный исследовательский Томский политехнический университет (ТПУ) Институт социально-гуманитарных технологий (ИСГТ) Кафедра экономики (ЭКОН) Международная научно-образовательная лаборатория технологий улучшения благополучия пожилых людей (МНОЛ ТУБПЛ)
Other Authors: Leece F. Francesca, Walsh V. Vincent, Didino D. Daniel, Cappelletti M. Marinella
Summary:Title screen
We investigated whether two features that are fundamental for quantity processing, namely numerosity and continuous quantity - or "how many" versus "how much" - may dissociate in the parietal lobe. Fourteen mathematically-normal participants performed a well-established numerosity discrimination task after receiving continuous theta bursttranscranial magnetic stimulation (TBS) over the left or right intraparietal sulcus (IPS) or the Vertex. We performed a detailed analysis of accuracy (based on the Weber Fraction, wf), which distinguished between trials in which numerosity was anti-correlated or 'incongruent' to other continuous measures of quantity, and trials in which numerosity and other continuous features were 'congruent'. Congruent trials can be processed by integrating numerosity or continuous quantity features like cumulative area since they correlate. Instead incongruent trials can only be processed based on numerosity and requires inhibiting cumulative area or other continuous quantity features like dot size and would lead to incorrect judgment if these features are used as a proxy for numerosity.
Language:English
Published: 2015
Subjects:
Online Access:http://dx.doi.org/10.1016/j.cortex.2015.08.007
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=645409

MARC

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330 |a We investigated whether two features that are fundamental for quantity processing, namely numerosity and continuous quantity - or "how many" versus "how much" - may dissociate in the parietal lobe. Fourteen mathematically-normal participants performed a well-established numerosity discrimination task after receiving continuous theta bursttranscranial magnetic stimulation (TBS) over the left or right intraparietal sulcus (IPS) or the Vertex. We performed a detailed analysis of accuracy (based on the Weber Fraction, wf), which distinguished between trials in which numerosity was anti-correlated or 'incongruent' to other continuous measures of quantity, and trials in which numerosity and other continuous features were 'congruent'. Congruent trials can be processed by integrating numerosity or continuous quantity features like cumulative area since they correlate. Instead incongruent trials can only be processed based on numerosity and requires inhibiting cumulative area or other continuous quantity features like dot size and would lead to incorrect judgment if these features are used as a proxy for numerosity. 
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