Abstract：
:Referential pointing is a characteristically human behavior, which involves moving a finger through space to direct an addressee towards a desired mental state. Planning this type of action requires an interface between sensorimotor and conceptual abilities. A simple interface could supplement spatially-guided motor routines with communicative-ostensive cues. For instance, a pointing finger held still for an extended period of time could aid the addressee's understanding, without altering the movement's trajectory. A more complex interface would entail communicative knowledge penetrating the sensorimotor system and directly affecting pointing trajectories. We compare these two possibilities using motion analyses of referential pointing during multi-agent interactions. We observed that communicators produced ostensive cues that were sensitive to the communicative context. Crucially, we also observed pervasive adaptations to the pointing trajectories: they were tailored to the communicative context and to partner-specific information. These findings indicate that human referential pointing is planned and controlled on the basis of partner-specific knowledge, over and above the tagging of motor routines with ostensive cues.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Murillo Oosterwijk A,de Boer M,Stolk A,Hartmann F,Toni I,Verhagen Ldoi
10.1038/s41598-017-04442-wsubject
Has Abstractpub_date
2017-06-27 00:00:00pages
4268issue
1issn
2045-2322pii
10.1038/s41598-017-04442-wjournal_volume
7pub_type
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