A section in which an operation for adjusting the posture of a living body or an object is performed is specified with high accuracy. The information processing apparatus (101) extracts the main motion section (111) and the adjustment motion section candidate (112) from the acquired sensor (102), as shown by (1) to (3) in FIG. . Next, as shown in (4) of FIG. 1, the information processing apparatus (101) adjusts the adjustment motion section based on the feature amount of the main motion section (111) and the feature amount of the adjustment motion section candidate (112). The relationship likelihood that the candidate (112) is the adjustment motion section with respect to the main motion section (111) is calculated. Then, the information processing apparatus (101), as shown by (5) in FIG. 1, is based on the calculated relationship likelihood, the adjustment operation section candidate (112) is an adjustment operation section with respect to the main operation section (111). It is determined whether or not there is.生体または物体の姿勢を調整する動作が行われた区間を精度良く特定する。情報処理装置(101)は、図1の(1)~(3)で示すように、取得したセンサ(102)から、主動作区間(111)と調整動作区間候補(112)とをそれぞれ抽出する。次に、情報処理装置(101)は、図1の(4)で示すように、主動作区間(111)の特徴量と調整動作区間候補(112)の特徴量とに基づいて、調整動作区間候補(112)が主動作区間(111)に対する調整動作区間である関係性尤度を算出する。そして、情報処理装置(101)は、図1の(5)で示すように、算出した関係性尤度に基づいて、調整動作区間候補(112)が主動作区間(111)に対する調整動作区間であるか否かを判定する。