Understanding visual access in common marmosets, Callithrix jacchus: perspective taking or behaviour reading?
We tested common marmosets’ understanding of visual access in a series of experiments. In experiment 1, we investigated whether marmosets know what conspecifics do and do not see, using a food competition paradigm originally developed for chimpanzees, Pan troglodytes. Subordinate marmosets consistently chose a piece of food only visible to them and not one that […]