A system is provided for obtaining and analyzing biological data of a subject. The system includes a biological data recording device that can sense biological signals of a subject over time and record the sensed biological signals as biological data. The system also includes an event time recording device that is physically separate from, and does not communicate with, the biological data recording device. The event time recording device includes a user actuatable component, and also includes a recording component that records user actuation data, which includes a time stamp indication as to when any instances of user actuation occurred. The system also includes equipment that can periodically receive the recorded biological data from the biological data recording device and the user actuation data from the event time recording device, and can correlate the biological data and the user actuation data to generate correlated biological data.
