title: OB3D, a new set of 3D objects available for research: a web-based study.
abstract: Studying object recognition is central to fundamental and clinical research on cognitive functions but suffers from the limitations of the available sets that cannot always be modified and adapted to meet the specific goals of each study. We here present a new set of 3D scans of real objects available on-line as ASCII files, OB3D. These files are lists of dots, each defined by a triplet of spatial coordinates and their normal that allow simple and highly versatile transformations and adaptations. We performed a web-based experiment to evaluate the minimal number of dots required for the denomination and categorization of these objects, thus providing a reference threshold. We further analyze several other variables derived from this data set, such as the correlations with object complexity. This new stimulus set, which was found to activate the Lower Occipital Complex (LOC) in another study, may be of interest for studies of cognitive functions in healthy participants and patients with cognitive impairments, including visual perception, language, memory, etc.
authors.affiliation: Département Action et Cognition en Situation Opérationnelle, Institut de Recherche Biomédicale des Armées Brétigny, France ; Cognition and Action Group, Cognac G, Service de Santé des Armées, Centre National de la Recherche Scientifique, Université Paris Descartes, Unités Mixtes de Recherche-MD 4 - 8257 Paris, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Buffat
authors.affiliation: Département Action et Cognition en Situation Opérationnelle, Institut de Recherche Biomédicale des Armées Brétigny, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Chastres
authors.affiliation: Département Action et Cognition en Situation Opérationnelle, Institut de Recherche Biomédicale des Armées Brétigny, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Bichot
authors.affiliation: Centre National de la Recherche Scientifique, Unités Mixtes de Service Relais d'Information sur les Sciences de la Cognition 3332 Paris, France.
authors.forename: Delphine
authors.initials: D
authors.lastname: Rider
authors.affiliation: Laboratoire des Systèmes Perceptifs, Département d'études Cognitives, Unités Mixtes de Recherche-8248, Centre National de la Recherche Scientifique, École Normale Supérieure Paris, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Benmussa
authors.affiliation: Centre National de la Recherche Scientifique, Unités Mixtes de Service Relais d'Information sur les Sciences de la Cognition 3332 Paris, France ; Laboratoire des Systèmes Perceptifs, Département d'études Cognitives, Unités Mixtes de Recherche-8248, Centre National de la Recherche Scientifique, École Normale Supérieure Paris, France.
authors.forename: Jean
authors.initials: J
authors.lastname: Lorenceau
keywords: category; data-set; normalization; object denomination; web-based experiment