An information processing apparatus acquires data indicating a time when a monitored subject is detected to have assumed a predetermined posture, based on an output value from a sensor corresponding to the monitored subject. The information processing apparatus (100) references a storage unit (110) judges whether the time indicated by the acquired data is included in a time period when the monitored subject assumes the predetermined posture. When the time indicated by the acquired data is not included in the time period when the predetermined posture is assumed, the information processing apparatus (100) detects an abnormality of the monitored subject. On the other hand, when the time indicated by the acquired data is included in the time period when the predetermined posture is assumed, the information processing apparatus (100) does not detect an abnormality of the monitored subject.
