Eye tracker calibration : How well can humans refixate a target?
Irrespective of the precision, the inaccuracy of a pupil-based eye tracker is about 0.5 ∘ . This paper delves into two factors that potentially increase the inaccuracy of the gaze signal, namely, 1) Pupil-size changes and the pupil-size artefact (PSA) and 2) the putative inability of experienced individuals to precisely refixate a visual target. Experiment 1 utilizes a traditional pupil-CR eye tra
