title: Grasping the world: object-affordance effect in schizophrenia.
abstract: For schizophrenic patients, the world can appear as deprived of practical meaning, which normally emerges from sensory-motor experiences. However, no research has yet studied the integration between perception and action in this population. In this study, we hypothesize that patients, after having controlled the integrity of their visuospatial integration, would nevertheless present deficit in sensory-motor simulation. In this view, we compare patients to control subjects using two stimulus-response compatibility (SRC) tasks. Experiment 1 is performed to ensure that visuo-spatial integration is not impaired (Simon Effect). Experiment 2 replicates a study from Tucker and Ellis (1998) to explore the existence of sensory-motor compatibility between stimulus and response (Object Affordance). In control subjects, the SRC effect appears in both experiments. In schizophrenic patients, it appears only when stimuli and responses share the same spatial localization. This loss of automatic sensory-motor simulation could emerge from a lack of relation between the object and the subject's environment.
authors.affiliation: Department of Psychiatry, University Hospital of Saint-Etienne, Pavillon 52A, 25 Boulevard Pasteur, 42055 Saint-Etienne Cedex 2, France ; Epsylon Laboratory, EA4556, Dynamics of Human Abilities and Health Behaviours, University of Montpellier III, Rue du Pr. Henri Serre, 34000 Montpellier, France.
authors.forename: Jessica
authors.initials: J
authors.lastname: Sevos
authors.affiliation: Department of Psychiatry, University Hospital of Saint-Etienne, Pavillon 52A, 25 Boulevard Pasteur, 42055 Saint-Etienne Cedex 2, France ; Epsylon Laboratory, EA4556, Dynamics of Human Abilities and Health Behaviours, University of Montpellier III, Rue du Pr. Henri Serre, 34000 Montpellier, France.
authors.forename: Anne
authors.initials: A
authors.lastname: Grosselin
authors.affiliation: Department of Psychiatry, University Hospital of Saint-Etienne, Pavillon 52A, 25 Boulevard Pasteur, 42055 Saint-Etienne Cedex 2, France ; Epsylon Laboratory, EA4556, Dynamics of Human Abilities and Health Behaviours, University of Montpellier III, Rue du Pr. Henri Serre, 34000 Montpellier, France.
authors.forename: Jacques
authors.initials: J
authors.lastname: Pellet
authors.affiliation: Department of Psychiatry, University Hospital of Saint-Etienne, Pavillon 52A, 25 Boulevard Pasteur, 42055 Saint-Etienne Cedex 2, France ; Epsylon Laboratory, EA4556, Dynamics of Human Abilities and Health Behaviours, University of Montpellier III, Rue du Pr. Henri Serre, 34000 Montpellier, France.
authors.forename: Catherine
authors.initials: C
authors.lastname: Massoubre
authors.affiliation: Epsylon Laboratory, EA4556, Dynamics of Human Abilities and Health Behaviours, University of Montpellier III, Rue du Pr. Henri Serre, 34000 Montpellier, France.
authors.forename: Denis
authors.initials: D
authors.lastname: Brouillet