Fig 1.

A. Illustration of the experimental conditions with Animal A as the focal animal. B. A cartoon example of a typical room layout and positioning of the cages. The large rectangle is the room and the small rectangles represent cages. Each single cage has two marmosets. For families, two single cages are connected to make one large cage. The cage with dashed line is the home cage recorded from. The transport cage is in front of the home cage. During separation, one animal was placed in the transport cage. C. Photos of a marmoset wearing a jacket with a voice recorder mounted at the chest. The green patch on the back is for video identification purposes.