PROBLEM TO BE SOLVED: To reduce an amount of necessary data and also preliminarily estimate an amount of necessary data for analyzing a user's interest.;SOLUTION: The interest analysis method includes: collectively storing, in boxes, intermediate results to be inquired when calculating a user interest score for each prescribed collection period and calculating the user interest score using the intermediate results stored in a box belonging to a history window size. When the history window size alone is defined as an analysis object or when weighting is performed according to a time, this configuration can reduce the amount of data of the intermediate results to be stored and also preliminarily estimate the amount of data.;COPYRIGHT: (C)2015,JPO&INPIT
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