1. A computer-implemented method of measuring eye data of a subject during emotional testing, the method being implemented by a computer executing one or more applications, the method comprising: obtaining, by the computer, a test stimulus; obtaining, by the computer, a conditioning stimulus, the conditioning stimulus comprising scrambled pixels of the test stimulus; causing, by the computer, the conditioning stimulus to be presented to a subject via a display device operatively coupled to the computer; causing, by the computer, the test stimulus to be presented to the subject via the display device; receiving, by the computer, from an eye-tracking device operatively coupled to the computer, eye data collected from the subject by the eye-tracking device while the subject viewed the test stimulus; and processing, by the computer, the collected eye data to determine the subject's emotional response to the test stimulus.