Human-Computer Etiquette

etiquette in motivational aGents 215

BEAT is designed to over-generate, producing nonverbal behaviors

at every point in an utterance that is sanctioned by theory. us atti-

tudes conveyed by an animated agent are eected primarily by reduc-

ing the number of suggested nonverbal behaviors, as appropriate. For

example, in a warm stance (high immediacy), fewer gaze away sug-

gestions are generated, resulting in increased gaze at the interlocutor,

whereas, in the neutral stance (low immediacy), fewer facial anima-

tion (eyebrow raises and head nods) and hand gesture suggestions are

generated. Such cues that are encoded through relative frequency of

behavior are currently implemented by means of a StanceManager

module which tracks the relational ...