This work was supported by National Natural Science Foundation of China (31170997) and National Basic Research Program of China (973 Program) (2012CB720704).
Object detection is completed earlier than object categorization: Evidence from LRP and N200
Article first published online: 2 AUG 2013
Copyright © 2013 Society for Psychophysiological Research
Volume 50, Issue 12, pages 1255–1262, December 2013
How to Cite
Li, Y., Zhong, W., Chen, Q. and Mo, L. (2013), Object detection is completed earlier than object categorization: Evidence from LRP and N200. Psychophysiology, 50: 1255–1262. doi: 10.1111/psyp.12131
- Issue published online: 11 NOV 2013
- Article first published online: 2 AUG 2013
- Manuscript Accepted: 5 JUN 2013
- Manuscript Received: 3 JUL 2012
- National Natural Science Foundation of China. Grant Number: 31170997
- National Basic Research Program of China. Grant Number: 2012CB720704
- Object recognition;
- Object detection;
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.