<qa>  What is the experimental link between object perception and potentially associated actions explored by?Brief Summary: In schizophrenia, dislocation of psychic functions involving a loss of contact with reality is frequently found. A fragmentation of motor and sensory perceptions could be held responsible. However, automatic integration between perception and action is the necessary condition to be in relationship with the world. Affordance is the experimental link between object perception and potentially associated actions Gibson, 1977, 1979 explored by Stimulus Response Compatibility SRC paradigm. With Tucker Ellis sensory motor compatibility task 1998, with a modified response device responses given with grasp, we study the impact of motor activation on these affordance effects. In this study, a group of controls will also be included in order to understand, as precisely as possible, the mechanisms involved i.e., interference between the perception of the object and the response gesture. 