Systems and methods for detecting changes in physiological indicators in communications data of participants of a communication and tagging those changes are described. According to an embodiment, a method uses an analytics module operating on at least one processor. Data indicative of a communication between participants is received. A physiological indicator of at least one of the participants is detected by analyzing the data. A change in the physiological indicator is determined in the data. A location of the data where the change in the physiological indicator occurred in the data is tagged. The tagging includes storing a tag indicating the location of the data where the change in physiological indicator occurred in memory.