The Trail Making Test: a simple model based on an eye-tracking study

In this paper we address the question of whether is it possible to model as a dynamical problem the behavior of subjects performing a neuropsychological test. We address the task employing the Trail Making Test in its part A. To be able to model the subjects behavior we first implement a digital version of the test which allow us to register the eye movements of the subjects during the performance. Then we analyze the eye tracking data and explore the behavior to be able to propose an equation representing the dynamics. With the equation at hand, an analysis of the parameters is performed in such a way different magnitudes could be related to neuropsychological constructs like processing speed, visual search speed and mental flexibility.