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Brain Topography

, Volume 31, Issue 6, pp 972–984 | Cite as

Increased Early Sensitivity to Eyes in Mouthless Faces: In Support of the LIFTED Model of Early Face Processing

  • Roxane J. ItierEmail author
  • Frank Preston
Original Paper

Abstract

The N170 ERP component is a central neural marker of early face perception usually thought to reflect holistic processing. However, it is also highly sensitive to eyes presented in isolation and to fixation on the eyes within a full face. The lateral inhibition face template and eye detector (LIFTED) model (Nemrodov et al. in NeuroImage 97:81–94, 2014) integrates these views by proposing a neural inhibition mechanism that perceptually glues features into a whole, in parallel to the activity of an eye detector that accounts for the eye sensitivity. The LIFTED model was derived from a large number of results obtained with intact and eyeless faces presented upright and inverted. The present study provided a control condition to the original design by replacing eyeless with mouthless faces, hereby enabling testing of specific predictions derived from the model. Using the same gaze-contingent approach, we replicated the N170 eye sensitivity regardless of face orientation. Furthermore, when eyes were fixated in upright faces, the N170 was larger for mouthless compared to intact faces, while inverted mouthless faces elicited smaller amplitude than intact inverted faces when fixation was on the mouth and nose. The results are largely in line with the LIFTED model, in particular with the idea of an inhibition mechanism involved in holistic processing of upright faces and the lack of such inhibition in processing inverted faces. Some modifications to the original model are also proposed based on these results.

Keywords

Faces Eyes N170 ERPs Gaze-contingent procedure Inhibition 

Notes

Acknowledgements

This work was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC Discovery Grants #418431); the Ontario government (Early Researcher Award, ER11-08-172); the Canada Foundation for Innovation (Grant #213322); and the Canada Research Chairs program (Grants #213322 and #230407) to RJI. We would also like to thank Marina Ren for help with testing, supported by an NSERC Undergraduate Studies Research Award (USRA).

Supplementary material

10548_2018_663_MOESM1_ESM.docx (293 kb)
Supplementary material 1 (DOCX 292 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of PsychologyUniversity of WaterlooWaterlooCanada

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