13. The method of claim 1 , wherein the top terms are determined based at least in part a frequency of the top terms in communications in the online forum in which the top terms co-occur with the topic.
1. A computer implemented method comprising: identifying a plurality of communications between members of an online forum that are related to a topic and occurred during a first time interval; determining, by a computer, a first plurality of top terms that occur in the identified plurality of communications; determining for each top term a first aggregate demographic value based on a demographic attribute of each of the members that used the top term during the first time interval; formatting for display a graph including at least one axis representing the demographic attribute associated with the members; and for each top term, formatting for display on the graph an icon representing the top terms with respect to the at least one demographic axis, wherein a location of the icon for the top term with respect to the demographic axis is based on the based on a frequency of use of the top term by those members that mentioned the top term in the communications.