Time course of spatial frequency integration in face perception: An ERP study.

摘要: Abstract Face perception is based on the processing and integration of multiple spatial frequency (SF) ranges. However, temporal dynamics SF to form an early face representation in human brain still a matter debate. To address this issue, we recorded event-related potentials (ERPs) during presentation frequency-manipulated facial images. Twenty-six participants performed gender discrimination task non-filtered, low-, high-, band-pass filtered images, corresponding, respectively, full range, frequencies up 8 cycles/image, above 32 cycles/image, from 8 16 cycles/image. Behaviorally, related-performance was more accurate faster for non-filtered (NF) mid-range (MSF) than low (LSF) high (HSF) stimuli. At both behavioral electrophysiological levels, response MSF contained faces did not differ responses spectrum In ERPs, LSF images evoked largest P1 amplitude while HSF N170 compared with other three conditions. Since LSFs HSFs would transmit global local information our observations lend further support “coarse-to-fine” theory faces. Furthermore, they offer original evidence effectiveness adequacy perception. Possible theoretical interpretations findings are discussed.