Humans are social creatures. Much of our intelligence derives from our
ability to manipulate our environment through collaborative endeavors
. Most extant computer programs and interfaces do little to take advan
tage of such manifestly human talents and interests, leaving broad ave
nues of human-computer communication unexplored. Although it is still
considered controversial, there are many who believe the harnessing of
social communication to be rich in possibilities for modern software.
In this article, we look at a number of autonomous agent systems that
embody their intelligence at least partially through the projection o
f a believable, engaging, synthetic persona. Among other topics, we to
uch briefly on samples of research that explore synthetic personality,
representations of emotion, societies of fanciful and playful charact
ers, intelligent and engaging automated tutors, and users projected as
avatars into virtual worlds.