PROBLEM TO BE SOLVED: To improve the extraction accuracy of an event correlated to a given event.SOLUTION: A correlation determination program causes a computer to calculate, on the basis of information indicating the occurrence time of each event, for each event of a first type, a time interval between the occurrence time of each event and the occurrence time of each event of a second type within predetermined time from the occurrence time, and for each of a plurality of ranges of values relating to the time intervals where at least one of a minimum value and a maximum value varies, compares a first ratio with respect to the size of the range of the number of time intervals among the set of time intervals included in the range with a second ratio with respect to the size of a range obtained by subtracting the range from the predetermined range of the number of time intervals among the set of time intervals not included in the range to determine the presence of correlation between the event of the first type and the event of the second type.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2016,JPO&INPIT【課題】或る事象に相関を有する事象の抽出精度を向上させること。【解決手段】相関判定プログラムは、コンピュータに、各事象の発生時期を示す情報に基づいて、第１の種別の事象ごとに、当該事象の発生時期と、当該発生時期から所定時間内に発生した第２の種別の各事象の発生時期との時間間隔を算出し、前記時間間隔に関する値の範囲であって、相互に最小値及び最大値の少なくともいずれか一方が異なる複数の範囲のそれぞれごとに、前記時間間隔の集合のうち当該範囲内に含まれる時間間隔の数の当該範囲の大きさに対する第１の割合と、前記時間間隔の集合のうち当該範囲に含まれない時間間隔の数の前記所定時間から当該範囲を除いた範囲の大きさに対する第２の割合とを比較して、前記第１の種別の事象と、前記第２の種別の事象との相関の有無を判定する、処理を実行させる。【選択図】図８
