Neurophysiological indices of perceptual object priming in the absence of explicit recognition memory

J.D. Harris, T.R.H. Cutmore, J. O'Gorman, S. Finnigan, Ho Keung David Shum

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)


The aim of this study was to identify ERP correlates of perceptual object priming that are insensitive to factors affecting explicit, episodic memory. EEG was recorded from 21 participants while they performed a visual object recognition test on a combination of unstudied items and old items that were previously encountered during either a 'deep' or 'shallow' levels-of-processing (LOP) study task. The results demonstrated a midline P150 old/new effect which was sensitive only to objects' old/new status and not to the accuracy of recognition responses to old items, or to the LOP manipulation. Similar outcomes were observed for the subsequent P200 and N400 effects, the former of which had a parietal scalp maximum and the latter, a broadly distributed topography. In addition an LPC old/new effect typical of those reported in past ERP recognition studies was observed. These outcomes support the proposal that the P150 effect is reflective of perceptual object priming and moreover, provide novel evidence that this and the P200 effect are independent of explicit recognition memory process(es). © 2008 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)132-141
Number of pages10
JournalInternational Journal of Psychophysiology
Issue number2
Publication statusPublished - 1 Feb 2009
Externally publishedYes


  • Event-related potentials
  • Object recognition
  • Priming

ASJC Scopus subject areas

  • Neuroscience(all)
  • Physiology (medical)
  • Neuropsychology and Physiological Psychology

Cite this