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An ERP investigation of orthographic priming with superset primes

Abstract : Prime stimuli formed by inserting unrelated letters in a given target word (called ``superset'' primes) provide a means to modify the relative positions of the letters shared by prime and target Here we examined the time-course of superset priming effects in an ERP study using the sandwich-priming paradigm. We compared the effects of superset primes formed by the insertion of unrelated letters (e.g., maurkdet-MARKET), or by the insertion of hyphens (e.g., ma-rk-et-MARKET), with identity priming (e.g., market-MARKET), all measured relative to unrelated control primes. Behavioral data revealed significantly greater priming in the hyphen-insert condition compared with the letter-insert condition. In the ERP signal, letter-insert priming emerged later than hyphen-insert priming and produced a reversed priming effect in the N400 time-window compared with the more typical N400 priming effects seen for both hyphen-insert priming and identity priming. The different pattern of priming effects seen for letter-insert primes and hyphen-insert primes suggests that compared with identity priming, letter superset priming reflects the joint influence of: (1) a disruption in letter position information, and (2) an inhibitory influence of mismatching letters. (C) 2014 Elsevier B.V. All rights reserved.
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Submitted on : Wednesday, January 11, 2017 - 4:35:14 PM
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Maria Ktori, Katherine Midgley, Phillip J. Holcomb, Jonathan Grainger. An ERP investigation of orthographic priming with superset primes. Brain Research, Elsevier, 2015, 1594, pp.233-244. ⟨10.1016/j.brainres.2014.10.043⟩. ⟨hal-01432336⟩



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