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Neural Representations of Numerical Processing across Semantic, Phonological, Visual, and Manual Formats

Koch, Griffin/E. (2020) Neural Representations of Numerical Processing across Semantic, Phonological, Visual, and Manual Formats. Master's Thesis, University of Pittsburgh. (Unpublished)

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Outstretched fingers can convey the same information as the symbol “5”, but how does our brain represent these different visual forms so that we understand the number five? Four constituents have been implicated as being involved in adult numerical processing: semantic, visual, manual, and phonological. Here, we utilize a novel paradigm that includes all four constituents, allowing us to ask how the brain represents them simultaneously. We collected functional magnetic resonance imaging (fMRI) data from adult participants while they completed our full code paradigm, as well as an additional paradigm that has been used previously to study numerical processing in adults and children (Cantlon & Li, 2013; Emerson & Cantlon, 2015). During our full code paradigm, participants viewed one of two stimulus types indicating a quantity: Arabic numerals (visual) or hands (manual), while completing one of two tasks: deciding if a quantity was greater than another number (semantic) or if the quantity contained a long vowel sound (phonological). Univariate analyses revealed similar activity during both the full code paradigm and the previously-used paradigm within right and left intraparietal sulcus, right IFG/Insula, and anterior cingulate cortex, while only the full code paradigm identified differences between semantic and phonological processing within left IFG/Insula. Such results, as well as opportunities for multivariate analytic techniques to be applied, support the utility of this novel paradigm for future studies investigating numerical processing.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Koch, Griffin/E.gek21@pitt.eduGEK210000-0001-5844-5051
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairCoutanche,
Committee MemberFiez,
Committee MemberLibertus,
Date: 8 June 2020
Date Type: Publication
Defense Date: 30 July 2019
Approval Date: 8 June 2020
Submission Date: 31 March 2020
Access Restriction: 2 year -- Restrict access to University of Pittsburgh for a period of 2 years.
Number of Pages: 31
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Psychology
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: numerical number fMRI
Date Deposited: 08 Jun 2020 15:11
Last Modified: 08 Jun 2020 15:11

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  • Neural Representations of Numerical Processing across Semantic, Phonological, Visual, and Manual Formats. (deposited 08 Jun 2020 15:11) [Currently Displayed]


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