a1 Motor Efficiency and Motor Deficiency Laboratory, Sport Sciences Department, University Montpellier 1, 34090 Montpellier, France. email@example.com firstname.lastname@example.org http://www.edm.univ-montp1.fr http://julienlagarde.free.fr/
Dijkerman & de Haan (D&dH) study perception and action as two independent processes. However, in all daily activities the processes are completely intertwined, so it is difficult to separate one from the other. Humans perceive in order to move and also move in order to perceive. Understanding first how perception and action are coordinated, leads us then to determine how each component works independently.