Electrophysiological individual face adaptation effects with fast periodic visual stimulation resist long...

This study used fast periodic visual stimulation (FPVS) and electroencephalography (EEG) to investigate whether the reduction of face adaptation effects over time is due to the introduction of a novel stimulus. In adapting sequences, one individual face was presented at a rate of 6 Hz over 60 s. In testing sequences this adapted face was alternated with a novel individual face at the same rate for 20 s, so that face identity was repeated at a frequency of 3 Hz (i.e. 6 Hz/2). Testing sequences started immediately or 9-15 s after adapting sequences. Identity adaptation produced a selective response at 3 Hz over the right occipito-temporal cortex both with and without delay after adapting sequences. These results suggest that the adaptation effect persists for several seconds, and that the decay of the adaptation effect is due to the introduction of a novel face stimulus.