title: Object detection is completed earlier than object categorization: evidence from LRP and N200.
abstract: The classic account of object recognition, which proposes that object detection precedes categorization, was challenged by recent behavioral evidence. The present study investigated the temporal relation between object detection and categorization by employing ERP measures. Participants performed a dual-choice go/no-go task based on the outcomes of object detection and categorization. A no-go lateralized readiness potential, which indexed motor preparation, was obtained only when detection determined responding hand and categorization determined go/no-go, indicating that detection was completed earlier and thus activated preparation. Additionally, the N200 effect, which indicated the completion of go/no-go, was obtained 70 ms earlier when detection determined go/no-go than when categorization determined go/no-go. Our ERP results indicate that object detection is completed earlier than categorization, which supports the traditional models of object recognition.
authors.affiliation: Center for Studies of Psychological Application and School of Psychology, South China Normal University, Guangzhou, China.
authors.forename: You
authors.initials: Y
authors.lastname: Li
authors.forename: Weifang
authors.initials: W
authors.lastname: Zhong
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.forename: Lei
authors.initials: L
authors.lastname: Mo
mesh_terms: D004569:Electroencephalography; D005074:Evoked Potentials, Visual; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation; D021641:Recognition, Psychology / Q000502:physiology*; D055815:Young Adult
keywords: Category; ERP; Object detection; Object recognition