Social psychologists have demonstrated that humans are able to accurately judge the attitudes and intentions of other people from a few dozen seconds of tone of voice, body language, and gesture. Moreover, people are largely unconcious of the signaling that supports these judgements, and the mechanism has received little attention from psychologists. I have developed a theory of this social signaling, and shown that computers can use these signals to accurately estimate people's interest, attraction, depression, and stress, and to predict outcomes in dating, salary negotiations, business networking, poker, etc. Interfaces can make use of these signals to help with personal health, social networking, wealth generation, and general quality of life.

For more detail, see the paper Socially Aware Computation and Communication IEEE Computer, March 2005