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Updated: Jul 7, 2026

A Method to Study Adaptation to Left-Right Reversed Audition
Published on: October 29, 2018
The effects of face inversion and contrast-reversal on efficiency and internal noise
Carl M Gaspar1, Patrick J Bennett, Allison B Sekuler
1Department of Psychology, Neuroscience and Behaviour, McMaster University, 1280 Main Street West, Hamilton, Ont., Canada L8S4L8. carl@psy.gla.ac.uk
Abstract:
Inverted and contrast-reversed faces are identified less accurately and less rapidly than normal, upright faces. The effects of inversion and contrast-reversal may reflect different sampling strategies and/or different levels of internal noise. To test these alternative hypotheses, we used a combination of noise-masking and response-consistency techniques to measure the internal noise and high-noise efficiency associated with the identification of upright, inverted, and contrast-reversed faces. We found that both face inversion and contrast-reversal reduced efficiency, but did not change internal noise.
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