The effect of scrambling upright and inverted faces on the N170.

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  • Additional Information
    • Source:
      Publisher: Sage in association with Experimental Psychology Society Country of Publication: England NLM ID: 101259775 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1747-0226 (Electronic) Linking ISSN: 17470218 NLM ISO Abbreviation: Q J Exp Psychol (Hove) Subsets: MEDLINE
    • Publication Information:
      Publication: 2018- : London : Sage in association with Experimental Psychology Society
      Original Publication: London : Informa Healthcare
    • Subject Terms:
      Face*; Evoked Potentials, Visual/*physiology ; Orientation/*physiology ; Pattern Recognition, Visual/*physiology; Analysis of Variance ; Electroencephalography ; Female ; Humans ; Male ; Photic Stimulation ; Reaction Time/physiology ; Young Adult
    • Abstract:
      The face inversion effect refers to a decrement in performance when we try to recognise familiar faces turned upside down (inverted), compared with familiar faces presented in their usual (upright) orientation. Recently, we have demonstrated that the inversion effect can also be found with checkerboards drawn from prototype-defined categories when the participants have been trained with these categories, suggesting that factors such as expertise and the relationships between stimulus features may be important determinants of this effect. We also demonstrated that the typical inversion effect on the N170 seen with faces is found with checkerboards, suggesting that modulation of the N170 is a marker for disruption in the use of configural information. In the present experiment, we first demonstrate that our scrambling technique greatly reduces the inversion effect in faces. Following this, we used Event-Related Potentials ( ERPs) recorded while participants performed an Old/New recognition study on normal and scrambled faces presented in both upright and inverted orientations to investigate the impact of scrambling on the N170. We obtained the standard robust inversion effect for normal faces: The N170 was both larger and delayed for normal inverted faces as compared with normal upright faces, whereas a significantly reduced inversion effect was recorded for scrambled faces. These results show that the inversion effect on the N170 is greater for normal compared with scrambled faces, and we interpret the smaller effect for scrambled faces as being due to the reduction in expertise for those faces consequent on scrambling.
    • Contributed Indexing:
      Keywords: Face inversion effect; N170 peak; configural processing; scrambled faces
    • Publication Date:
      Date Created: 20181027 Date Completed: 20181119 Latest Revision: 20181119
    • Publication Date:
      20240829
    • Accession Number:
      10.1177/1747021817744455
    • Accession Number:
      30362407