An ERP study of visual change detection : Effects of magnitude of spatial frequency changes on the change-related posterior positivity

• Kimura, Motohiro

• Katayama, Jun'ichi

• Murohashi, Harumitsu

抄録

In event-related brain potential (ERP) studies using a visual S1–S2 matching task, change stimuli elicit a posterior positivity at around 100–200 ms. In the present study, we investigated the effects of magnitude of spatial frequency changes on change-related positivity. Each trial consisted of two sequentially presented stimuli (S1–S2), where S2 was either (1) the same as S1 (i.e., NO-change, p = .40), (2) different from S1 in spatial frequency only (SF-change, .40), (3) different in orientation only (OR-change, .10), or (4) different in both spatial frequency and orientation (BOTH-change, .10). Further, three magnitude conditions (Large, Medium, and Small) were used to examine the effect of the magnitude of the spatial frequency change. Participant's (N = 12) task was to respond to S2 with a change in orientation (from vertical to horizontal, or from horizontal to vertical) regardless of the spatial frequency of the stimulus. Changes in the spatial frequency elicited change-related positivity at a latency range of about 120–180 ms, which was followed by a central negativity (N270) and a late positive component (LPC). The amplitude of the change-related positivity tends to be enhanced as the magnitude of the change is increased. These results support the notion that the change-related positivity reflects memory-based change detection in the human visual system.

収録刊行物

• International Journal of Psychophysiology

  International Journal of Psychophysiology 62 (1), 14-23, 2006-10

  Elsevier B.V.

キーワード

• Event-related brain potential (ERP)
• Visual change detection
• Magnitude of stimulus changes

詳細情報

• CRID: 1050282813956740096
• NII論文ID: 120000953108
• HANDLE: 2115/14701
• ISSN: 01678760
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles