Electrophysiological correlates of visual search asymmetry in humans

Y. Sugita*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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 languageEnglish
Pages (from-to)1693-1696
Number of pages4
Issue number12
Publication statusPublished - 1995
Externally publishedYes


  • Event related potential
  • Pop out
  • Visual search

ASJC Scopus subject areas

  • Neuroscience(all)


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