http://www.current-biology.com/conte...60982205001041
Monkeys Pay Per View: Adaptive Valuation of Social Images by Rhesus Macaques
Robert O. Deaner, Amit V. Khera, and Michael L. Platt
Monkeys differentially value the opportunity to acquire visual information about particular classes of social images. Male rhesus macaques sacrificed juice for the opportunity to view female perinea and the faces of high-status monkeys but required juice overpayment to view the faces of low-status monkeys.
