Pupil Sizes Scale with Attentional Load and Task Experience in a Multiple Object Tracking Task Wahn, Basil ; Ferris, Daniel P. ; Hairston, W. David ; König, Peter Abstract Publication: PLoS ONE Pub Date: December 2016 DOI: 10.1371/journal.pone.0168087 Bibcode: 2016PLoSO..1168087W