Patent Document ID: 8412650
Application ID: 12717834

Base Claim:
1. A text analysis device having a physical processor, the device comprising: storage means configured to store opinions of users who participate in a discussion about a predetermined theme as text data and author information for specifying authors of the text data; feature quantity data generation means performed by the processor and configured to generate feature quantity data of the text data stored in the storage means; observation time-series signal generation means performed by the processor and configured to generate observation time-series signals based on information obtained by performing a predetermined process with respect to the feature quantity data; time-series node pattern generation means performed by the processor and configured to learn the observation time-series signals to specify node labels of the text data and to generate a time-series node pattern in which the node labels are arranged in order corresponding to the observation time-series signals; change point detection means performed by the processor and configured to detect a change point of the discussion based on the time-series node pattern; and influence specifying means performed by the processor and configured to specify an opinion having influence on an opinion corresponding to the specified text data out of opinions of the discussion based on the detected change point and the author information.

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Claim 5:
5. The text analysis device according to claim 1 , wherein the observation time-series signal generation means calculates polarity information of an object to be evaluated, which is set in advance, with respect to the opinions of the text data corresponding to the feature quantity data, based on the feature quantity data, and generates the observation time-series signals based on the calculated polarity information.