TREND EVALUATION DEVICE, ITS METHOD, AND PROGRAM

摘要

A trend evaluation device includes trend evaluation means having at least one of relative cooccurrence probability calculation means for calculating a change of cooccurrence probability of a keyword and an associated word and relative associated word similarity calculation means for calculating a change degree of a conversation topic concerning the keyword, so as to calculate a trend score by considering one or more combinations of the relative cooccurrence probability and the relative associated word similarity obtained by these means.