Hall, L;    Aylett, R;    Hume, C;    Krumhuber, E;    Degens, N;      (2012)    Incorporating multi-modal evaluation into a technology enhanced learning experience.                     In: Böck, R and Bonin, F and Campbell, N, (eds.) Intelligent Virtual Agents.  (pp. pp. 161-174).  Springer: Santa Cruz, USA.       Green open access