Theeuwes教授講演会

視覚認知研究の気鋭の研究者をお迎えし、講演会を開催いたします。
講演者のTheeuwes教授は視覚的注意や眼球運動に関する数多くの興味深い実験研究を展開してこられた方で、今回は、事前の空間的または非空間的情報が後の視覚認知に及ぼす影響の違いについてお話をしていただきます。参加費は無料です。お気軽にご来聴ください。

日時：2008年1月12日(土)　 午後4時00分-5時00分
場所：東京大学 本郷キャンパス 法文1号館1階115教室
    http://www.u-tokyo.ac.jp/campusmap/cam01_01_01_j.html
主催：日本心理学会 注意と認知研究会
協力：東京大学文学部心理学研究室

講演者: Jan Theeuwes 教授
Cognitive Psychology, Vrije Universiteit, Amsterdam, The Netherlands.

講演のタイトルと要旨
http://staff.aist.go.jp/jun.kawahara/AandC/#2007

Early bottom-up and later top-down attentional selection

Even though it is undisputed that prior information regarding the location of a target affects visual selection, the issue whether information regarding non-spatial features such as color and shape has similar effects has been a matter of debate since the early 1980's. We used measures derived from signal detection theory and show that perceptual sensitivity is affected by a top-down set for spatial information but not by top-down set for non-spatial information. So knowing where the target is affects perceptual selectivity; knowing what it is does not help selectivity. Furthermore, perceptual sensitivity can be enhanced by non-spatial features but only through a process related to bottom-up priming. On the basis of these experiments we conclude that top-down control for non-spatial information cannot modulate the initial sweep of information through the brain. This suggests the first feedforward sweep is bottom-up and not biased by top-down information. We assume that the modifications of the initial bottom-up saliency map through recurrent processing is the way top-down control is implemented in the brain.

お問い合わせ先：
産業技術総合研究所人間福祉医工学研究部門
河原純一郎

Tel: 029-861-6790
E-mail: jun.kawahara[at]aist.go.jp