Systems and methods facilitating objective evaluations of subjects to facilitate detecting clinically relevant changes in balance are provided. The system includes a portable balance board with a sensor in each of four feet for detecting downward force. Each sensor is communicatively coupled to a circuit board with a wired or wireless communication capability. A subject stands on the balance board and each sensor sends a signal to the circuit board, which communicates the four signals to a companion device that uses the signals to calculate the center of pressure (“COP”) of the subject over time. The subject can perform the BESS test and the resulting COP data is used to calculate a field path length for the subject. The field path length is compared to a previously determined baseline path length for the subject to detect any clinically relevant change in balance of the subject.