Advanced Tools for the Study of Natural Interactivity. - Claudia Soria; Niels Ole Bernsen; Niels Cadée; Jean Carletta; Laila Dybkjær; Stefan Evert; Ulrich Heid; Amy Isard; Mykola Kolodnytsky; Christoph Lauer; Wolfgang Lezius; Lucas P. J. J. Noldus; et al. (LREC, 2002)