ABSTRACT
Th ere is ongoing development in the modeling of interactions between virtual agents and their human counterparts to increase the verisimilitude of the interaction (André, Klesen, Gebhard, Allen, & Rist, 2000). In addition to making the appearance of virtual agents more humanlike (e.g., their face and body shape, skin texture, hairstyle, motion, and clothing), creating believable relationships between agents and humans constitutes a major challenge for the future (Magnenat-Th almann & Th almann, 2005). Various attempts have been made to introduce realistic high-level behavior in digital human models (DHM). Agents are equipped with features to appear intelligent, to express diff erent emotions, and even generate personality (Egges, Kshirsagar, & Magnenat-Th almann, 2004; Gratch et al., 2002).
