Development, maturation and learning influence on handwriting kinematics

► Kinematic parameters are useful to study writing development. ► Writing strategy improves till the 3rd S, as evidenced by number of letters/cm. ► The motor automation, measured by number of strokes/letter, increases with schooling. ► Improvement of motor planning, measured by mean time in air and on paper, is observed. ► The stroke horizontal and curvilinear velocities increase with schooling.