17. The computer system of claim 10 , wherein the weight assigned to each respective participant is further based on a measure of social network connectivity of each respective participant.
10. A computer system for facilitating a meeting of a group of participants, the system comprising: a memory having computer readable instructions; and a processor configured to execute the computer readable instructions for: receiving, in electronic text form, words uttered by the participants during the meeting; generating a graph of the words from the participants as the words are received from the participants, wherein the graph includes a plurality of nodes and a plurality of edges, each node representing a word or a phrase uttered by a participant, and each edge representing a temporal precedence of utterance of the words; analyzing the graph of the words to determine cognitive states of each of the participants respectively; determining a combined cognitive state for a subgroup of participants, wherein the combined cognitive state for the subgroup of participants represents a composite of the cognitive states of each respective participant of the subgroup, wherein determining the combined cognitive state comprises: retrieving, from an information repository, weights associated with respective participants of the subgroup of participants, wherein a weight assigned to each respective participant is based on a prior social network post of the each respective participant that is automatically retrieved and analyzed from an external information repository; and combining the cognitive states of the participants of the subgroup according to the corresponding weights of the participants of the subgroup; and informing at least one of the participants about the combined cognitive state of the subgroup of participants, wherein the informing comprises transmitting audio-visual message to the at least one of the participants.