Abstract
Visual evoked potentials (VEPs) were recorded during a visual search task to evaluate parallel and serial models of visual processing. A target stimulus elicited a discrete posterior negative wave in the 150-300 ms latency range. Furthermore, there was a close correlation between the search performance and the activity of the negative wave. When the target had a unique feature, neither the search time nor the characteristics of the negative wave was affected by the number of items in display. However, when the target lacked a unique feature, both the search time and the latency of the negative wave increased with the number of items, These results were consistent with a claim that an object with a unique feature is detected preattentively.
Original language | English |
---|---|
Pages (from-to) | 1693-1696 |
Number of pages | 4 |
Journal | NeuroReport |
Volume | 6 |
Issue number | 12 |
Publication status | Published - 1995 |
Externally published | Yes |
Keywords
- Event related potential
- Pop out
- Visual search
ASJC Scopus subject areas
- Neuroscience(all)