Combination across domains

An MEG investigation into the relationship between mathematical, pictorial, and linguistic processing

Douglas K. Bemis, Liina Pylkkänen

    Research output: Contribution to journalArticle

    Abstract

    Debates surrounding the evolution of language often hinge upon its relationship to cognition more generally and many investigations have attempted to demark the boundary between the two. Though results from these studies suggest that language may recruit domaingeneral mechanisms during certain types of complex processing, the domain-generality of basic combinatorial mechanisms that lie at the core of linguistic processing is still unknown. Our previous work (Bemis and Pylkkänen, 2011, 2012) used magnetoencephalography to isolate neural activity associated with the simple composition of an adjective and a noun ("red boat") and found increased activity during this processing localized to the left anterior temporal lobe (lATL), ventro-medial prefrontal cortex (vmPFC), and left angular gyrus (lAG). The present study explores the domain-generality of these effects and their associated combinatorial mechanisms through two parallel non-linguistic combinatorial tasks designed to be as minimal and natural as the linguistic paradigm. In the first task, we used pictures of colored shapes to elicit combinatorial conceptual processing similar to that evoked by the linguistic expressions and find increased activity again localized to the vmPFC during combinatorial processing.This result suggests that a domain-general semantic combinatorial mechanism operates during basic linguistic composition, and that activity generated by its processing localizes to the vmPFC. In the second task, we recorded neural activity as subjects performed simple addition between two small numerals. Consistent with a wide array of recent results, we find no effects related to basic addition that coincide with our linguistic effects and instead find increased activity localized to the intraparietal sulcus.This result suggests that the scope of the previously identified linguistic effects is restricted to compositional operations and does not extend generally to all tasks that are merely similar in form.

    Original languageEnglish (US)
    Article numberArticle 583
    JournalFrontiers in Psychology
    Volume3
    Issue numberJAN
    DOIs
    StatePublished - 2013

    Fingerprint

    Linguistics
    Prefrontal Cortex
    Parietal Lobe
    Language
    Magnetoencephalography
    Ships
    Temporal Lobe
    Semantics
    Cognition

    Keywords

    • Cognitive neuroscience
    • Combinatorics
    • Domain-generality
    • Language
    • Temporal lobe

    ASJC Scopus subject areas

    • Psychology(all)

    Cite this

    Combination across domains : An MEG investigation into the relationship between mathematical, pictorial, and linguistic processing. / Bemis, Douglas K.; Pylkkänen, Liina.

    In: Frontiers in Psychology, Vol. 3, No. JAN, Article 583, 2013.

    Research output: Contribution to journalArticle

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