Investigations of reaction time have been employed in various medical specialties as well as psychology. Although numerous tools have been
employed, a universal diagnostic tool has yet to be developed in meeting the requirements of all specialties. Therefore, based on the assumptions
of the test theory, we developed a new diagnostic tool, a designed program, designated as Reactor. Subsequent to its implementation in Visual
Basic for application and MS Access, Reactor was initially estimated in a group of students. Preliminary evaluation of the Reactor has revealed
that it is an innovative and useful diagnostic tool in compliance with the physiological model of reaction time in humans.