Two visual targets for the price of one? Pupil dilation shows reduced mental effort through temporal integration
Psychonomic Bulletin & Review (2015) - Comments
pubmed: 24841237  doi: 10.3758/s13423-014-0667-5  issn: 1531-5320  issn: 1069-9384 

Michael J. Wolff, Sabine Scholz, Elkan G. Akyürek, Hedderik Van Rijn