title: Parallel processing of shape and texture in haptic search.
abstract: In a haptic search task, one has to determine the presence of a target among distractors. It has been shown that if the target differs from the distractors in two properties, shape and texture, performance is better than in both single-property conditions (Van Polanen, Bergmann Tiest, & Kappers, 2013). The search for a smooth sphere among rough cubical distractors was faster than both the searches for a rough sphere (shape information only) and for a smooth cube (texture information only). This effect was replicated in this study as a baseline. The main focus here was to further investigate the nature of this integration. It was shown that performance is better when the two properties are combined in a single target (smooth sphere), than when located in two separate targets (rough sphere and smooth cube) that are simultaneously present. A race model that assumes independent parallel processing of the two properties could explain the enhanced performance with two properties, but this could only take place effectively when the two properties were located in a single target.
authors.affiliation: MOVE Research Institute, Faculty of Human Movement Sciences, VU University, Amsterdam, The Netherlands. Electronic address: v.van.polanen@vu.nl.
authors.forename: Vonne
authors.initials: V
authors.lastname: van Polanen
authors.affiliation: MOVE Research Institute, Faculty of Human Movement Sciences, VU University, Amsterdam, The Netherlands.
authors.forename: Wouter M
authors.initials: WM
authors.lastname: Bergmann Tiest
authors.affiliation: MOVE Research Institute, Faculty of Human Movement Sciences, VU University, Amsterdam, The Netherlands.
authors.forename: Astrid M L
authors.initials: AM
authors.lastname: Kappers
mesh_terms: D000293:Adolescent; D005106:Exploratory Behavior / Q000502:physiology*; D005260:Female; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008297:Male; D011930:Reaction Time / Q000502:physiology; D013236:Stereognosis / Q000502:physiology*; D055698:Touch Perception / Q000502:physiology*; D055815:Young Adult
keywords: Haptic search; Integration; Perception; Race model; Shape; Texture