Fig. 2
From: earEOG via periauricular electrodes to facilitate eye tracking in a natural headphone form factor
Overview of the different gaze stimuli and tasks presented to study participants. (a) 1D smooth pursuit points in horizontal and vertical directions with opening angles of \(2.5^{\circ }\) to \(15^{\circ }\). The dot moves on a circle around the center, with its starting position randomly selected on the circle; (b) visual target moving on a straight line with simple harmonic motion that is shown to participants to elicit smooth pursuit eye motion; (c) fixations points in four cardinal directions with \(2.5^{\circ }\) increments and center resting point; (d) visual target point shown to participants that shrinks during fixation.
