title: Time-course of perceptual processing of "hole" and "no-hole" figures: an ERP study.
abstract: Closure or the presence of a "hole" is an emergent perceptual feature that can be extracted by the visual system early on. This feature has been shown to have perceptual advantages over openness or "no-hole". in this study, we investigated when and how the human brain differentiates between "hole" and "no-hole" figures. Event-related potentials (ERPs) were recorded during a passive observation paradigm. Two pairs of simple figures (Experiment 1) and two sets of Greek letters (Experiment 2) were used as stimuli. The ERPs of "hole" and "no-hole" figures differed ∼90 ms after stimulus onset: "hole" figures elicited smaller P1 and N1 amplitudes than "no-hole" figures. These suggest that both P1 and N1 components are sensitive to the difference between "hole" and "no-hole" figures; perception of "hole" and "no-hole" figures might be differentiated early during visual processing.
authors.affiliation: School of Information Science, Yunnan University, Kunming, 650092, China. zhuweina.cn@gmail.com
authors.forename: Weina
authors.initials: W
authors.lastname: Zhu
authors.forename: Junjun
authors.initials: J
authors.lastname: Zhang
authors.forename: Changle
authors.initials: C
authors.lastname: Zhou
mesh_terms: D000328:Adult; D003210:Concept Formation; D005074:Evoked Potentials, Visual / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010466:Perceptual Closure / Q000502:physiology*; D011930:Reaction Time / Q000502:physiology*; D012016:Reference Values; D013997:Time Factors; D055815:Young Adult