Disorders of the Sense of Self and Physical Activity

"\- Physical activity: We will compare the impact of 3 different environments (with no object in the environment, vs. with some objects but no hidden objects vs. with objects at the fore- and background) during (total of 9 sessions of 30 minutes + 3\*5 minutes of testing), on the measure of self (see below).~Visit 10: We will repeat a walking session. Participants will wear mixed-reality goggles, which allow them to visualize the environment and superimpose a continuous stream of light. This session is intended to test the idea that this flow would enable SZ patients to suffer less from the discontinuous appearance of information when moving around.~Measure of 'self' : the participants will decide whether the line presented on a computer screen is static or moving. They will be immobile, walking on the spot in front of the computer, or passively mobilized with a whole-body movement platform. The latter condition will be used only in the first phase of the protocol"