Evidence for a General Neural Signature of Face Familiarity

Authors: Dalski, A., Kovács, G. and Ambrus, G.G.

Journal: Cerebral Cortex

Volume: 32

Issue: 12

Pages: 2590-2601

eISSN: 1460-2199

ISSN: 1047-3211

DOI: 10.1093/cercor/bhab366

Abstract:

We explored the neural signatures of face familiarity using cross-participant and cross-experiment decoding of event-related potentials, evoked by unknown and experimentally familiarized faces from a set of experiments with different participants, stimuli, and familiarization-types. Human participants of both sexes were either familiarized perceptually, via media exposure, or by personal interaction. We observed significant cross-experiment familiarity decoding involving all three experiments, predominantly over posterior and central regions of the right hemisphere in the 270-630 ms time window. This shared face familiarity effect was most prominent across the Media and the Personal, as well as between the Perceptual and Personal experiments. Cross-experiment decodability makes this signal a strong candidate for a general neural indicator of face familiarity, independent of familiarization methods, participants, and stimuli. Furthermore, the sustained pattern of temporal generalization suggests that it reflects a single automatic processing cascade that is maintained over time.

https://eprints.bournemouth.ac.uk/36372/

Source: Scopus