1. a French National Research and Safety Institute (INRS), Working Life Department , Biomechanics and Ergonomics Laboratory , Avenue de Bourgogne, BP 27, 54501, Vandoeuvre, France
2. b Paris VIII University, Cognition Language Interaction Doctoral School, Paragraphe Laboratory , 2, Rue de la Liberté, 93 526 Saint Denis Cedex 2, France