Fig 4. Effect of gaze data accuracy on classification performance of simulated fixations (on eyes, nose & mouth) within the face ellipse.

(A) Visualization of the face ellipse and the simulated fixation points with an accuracy of 1.5° (n = 100, averaged over 30 simulated fixations) in red. (B) Green indicates correct classification within the face ellipse compared to orange for misclassification outside the face ellipse. The stimulus shown in A was created for illustrative purposes only and is not part of the stimulus set used in the study (see Methods section).