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164 Socially Intelligent Agents

plies that joint attention and action capture intertwine with each other, playing
important roles in infants’ development of social communication. Therefore,
we have implemented in Infanoid the primordial capability of joint attention
and are working on that of action capture.
Social intelligence has to have an ontogenetic history that is similar to that
of humans and is open to further adaptation to the social environment; it also
has to have a naturalistic embodiment in order to experience the environment
in a way that is similar to humans’. Our ongoing attempt to foster Infanoid
will tell us the prerequisites (nature) for and developmental process (nurture)
of the artificial social beings that we can relate to.

Notes
1. Joint attention requires not only focusing on the same object, but also mutual acknowledgement
of this sharing action. We assume that joint attention before “nine-month revolution” [9] is reflexive—
therefore, without this mutual acknowledgement.
References

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