Appl Artif Intell 2010 Jul;24(6):648-666
Northeastern University College of Computer and Information Science, 360 Huntington Ave, WVH202, Boston, MA 02115.
We discuss issues in designing virtual humans for applications which require long-term voluntary use, and the problem of maintaining engagement with users over time. Concepts and theories related to engagement from a variety of disciplines are reviewed. We describe a platform for conducting studies into long-term interactions between humans and virtual agents, and present the results of two longitudinal randomized controlled experiments in which the effect of manipulations of agent behavior on user engagement was assessed. Read More