title: Attentional selection of complex objects: joint effects of surface uniformity and part structure.
abstract: What object properties warrant selection by object-based attention? Previous research has suggested that surface uniformity is required for object-based attentional selection (Watson & Kramer, 1999), yet nonuniform objects are encountered frequently. In the present experiments, we investigated the interplay between surface uniformity and part boundaries and their effect on object-based attention. Specifically, we asked if attention can select nonuniform objects whose surface changes occur at part boundaries. Although uniformly colored objects did exhibit object-based effects, we only observed an object-based effect for multicolored objects when surface changes occurred at part boundaries. These findings suggest that attention can only select nonuniform objects when the surface change occurs at a part boundary.
authors.affiliation: Department of Psychology, University of Iowa, Iowa City, Iowa 52242-1407, USA. lauren-hecht@uiowa.edu
authors.forename: Lauren N
authors.initials: LN
authors.lastname: Hecht
authors.forename: Shaun P
authors.initials: SP
authors.lastname: Vecera
mesh_terms: D001288:Attention; D002755:Choice Behavior; D006801:Humans; D011930:Reaction Time; D014796:Visual Perception