“…Examples include methods based on video analysis (Camurri, Mazzarino, Ricchetti, Timmers, & Volpe, 2004;Guedes, 2006;Jensenius, 2006), motion capture data (Dahl, 2000;Palazzi et al, 2009;Shiratori, Nakazawa, & Ikeuchi, 2003;Wanderley, Vines, Middleton, McKay, & Hatch, 2005) and sensing devices (e.g., Clynes, 1995;Enke & Borchers, 2006;Yamamoto & Fujinami, 2008). However, the recording techniques impose several constraints.…”