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An ERP investigation of transposed-word effects in same-different matching

Abstract : Can several words be read in parallel, and if so, how is information about word order encoded under such circumstances? Here we focused on the bottom-up mechanisms involved in word-order encoding under the hypothesis of parallel word processing. We recorded EEG while participants performed a visual same-different matching task with sequences of five words (reference sequence followed by a target sequence each presented for 400 ms). The reference sequence could be grammatically correct or an ungrammatical scrambling of the same words (e.g., he wants these green apples/green wants these he apples). Target sequences for 'different' responses were created by either transposing two words in the reference (e.g., he these wants green apples/green these wants he apples), or by changing two words (e.g., he talks their green apples/green talks their he apples). Different responses were harder to make in the transposition condition, and this transposed-word effect started to emerge around 250 ms post-target onset. The transposed-word effect was first seen on an early onsetting N400 component, with reduced amplitudes (i.e., less negative ERPs) in the transposed condition relative to a two-word replacement condition. A later transposed-word effect was seen on a more temporally widespread positive-going component. Converging behavioral and EEG results showed no effects of reference grammaticality on 'different' responses nor an interaction with transposed-word effects. Our results point to the noisy, bottom-up association of word identities to spatiotopic locations as one means of encoding word order information, and one key source of transposed-word effects.
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https://hal-amu.archives-ouvertes.fr/hal-03226383
Contributor : Julien Caugant <>
Submitted on : Friday, May 14, 2021 - 2:33:54 PM
Last modification on : Saturday, September 11, 2021 - 3:45:39 AM
Long-term archiving on: : Sunday, August 15, 2021 - 6:21:26 PM

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Felipe Pegado, Yun Wen, Jonathan Mirault, Stéphane Dufau, Jonathan Grainger. An ERP investigation of transposed-word effects in same-different matching. Neuropsychologia, Elsevier, 2021, 153, ⟨10.1016/j.neuropsychologia.2021.107753⟩. ⟨hal-03226383⟩

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