≪Organizer Abstract≫
The common marmoset, (Callithrix jacchus), a small New World monkey species, has received increasing attention in psychology, neuroscience and related fields. Common marmosets live in small family groups, in which the father and older offspring play a major role in caring for the infants. This cooperative breeding is hypothesized to be linked to improved skills in socio-cognitive and communicative processes. In fact, common marmosets are highly prosocial so that they take a reward for a partner next to them even if they cannot receive a reward for themselves (i.e., 0/1). They can discriminate a third-party's reciprocal and non-reciprocal exchange. Common marmosets have a wide variety of vocal repertoires to communicate each other. They can learn to use tools. In this symposium, four speakers will present their recent studies on marmosets' cognition, including social recognition, vocalization, and tool-use. A review of marmosets' cognition is also to be provided.
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