Complexity, Regularity and Non-linear Behaviour in Human Eye Movements: Analysing the Dynamic of Gaze in the Virtual Sailing Programs

Abstract

Nonlinear analysis of the behaviour of biological signals in humans is studied from different scientific disciplines. The aim of this study was to analyse the possible nonlinear behaviour present in the eye movements during eye tracking tasks in simulated sailing.Thirty young sailors were selected. Fuzzy entropy and detrending fluctuation analysis were applied to quantify the regularity and complexity of eye movements. The results show a more regular visual behaviour in the eye displacement and more irregular in velocity. The sailors demonstrate a visual behaviour that is more complex in the displacement of the eyes and less complex in the velocity of the eyes movements. These characteristics could be related with a functional behaviour of the sailors, based on complexity and stability, and it has been associated with the aptitude of the human in order to adapt to the environment.