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Group-specific gestures in the three Taï groups.
| Gesture | Form | Meaning | North group | South group | East group |
|---|---|---|---|---|---|
| NEST-BUILDING | Bending together (a few) branches or saplings | Invitation to play | − | + | + |
| Sexual solicitation | − | + | − | ||
| KNUCKLE-KNOCKING | Knocking knuckles on hard surface | Sexual solicitation | + | − | − |
| LEAF IN MOUTH | Holding a leaf in the mouth | Invitation to play | + | − | ? |
+ = present (observed once a week); − = absent; and? = limited observation time (based on Luncz and Boesch, 2015).
