Inversion improves the recognition of facial expression in thatcherized images

Psalta, Lilia and Andrews., Timothy J (2014) Inversion improves the recognition of facial expression in thatcherized images. Perception, 43 (8). pp. 715-730. ISSN 0301-0066

[thumbnail of Author Accepted Version]
Preview
PDF (Author Accepted Version) - Accepted Version
Available under License Creative Commons Attribution Non-commercial No Derivatives.

1MB

Official URL: http://dx.doi.org/10.1068/p7755

Abstract

The Thatcher illusion provides a compelling example of the face inversion effect. However, the marked effect of inversion in the Thatcher illusion contrasts to other studies that report only a small effect of inversion on the recognition of facial expressions. To address this discrepancy, we compared the effects of inversion and thatcherization on the recognition of facial expressions. We found that inversion of normal faces caused only a small reduction in the recognition of facial expressions. In contrast, local inversion of facial features in upright thatcherized faces resulted in a much larger reduction in the recognition of facial expressions. Paradoxically, inversion of thatcherized faces caused a relative increase in the recognition of facial expressions. Together, these results suggest that different processes explain the effects of inversion on the recognition of facial expressions and on the perception of the Thatcher illusion. The grotesque perception of thatcherized images is based on a more orientation-sensitive representation of the face. In contrast, the recognition of facial expression is dependent on a more orientation-insensitive representation. A similar pattern of results was evident when only the mouth or eye region was visible. These findings demonstrate that a key component of the Thatcher illusion is to be found in orientation-specific encoding of the features of the face.


Repository Staff Only: item control page