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Three experiments examined feature-based top-down control of search in a patient with right frontal-temporal lobe brain damage (YW), in comparison with normal control participants. In Experiment 1, YW showed normal search functions for single-feature targets. However, he showed abnormal search functions relative to normal control participants when a(More)
Tactile ground surface indicators installed on sidewalks help visually impaired people walk safely. The visually impaired distinguish the indicators by stepping into its convexities and following them. However, these indicators sometimes cause the nonvisually impaired to stumble. This study examines the effects of these indicators by comparing the kinematic(More)
and by a Human Brain Project grant to the International Consortium for Brain Mapping, funded jointly by NIMH and NIDA (P20 MH/DA52176). We also appreciate the support of Jacqueline Merveille, Yves Christen, Brad Hyman, and the members of the IPSEN Foundation, for hosting the Colloque Médecine et Recherche at which these findings were reported. ABSTRACT(More)
In visual search situations, it is known that not only bottom-up factors relative to the presented stimulus display but also top-down factors, which include foreknowledge about the target or observers' strategies for the task, have an influence on search performance. The present study examines how top-down attentional control settings affect the visual(More)
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