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Key predictions about function of laterality
| Prediction | Right-handed gesture | Left-handed gesture | Observed |
|---|---|---|---|
| Type of response to the gesture by recipient | Activity change | Emotional display | yes |
| Communicative repair | Present | Absent | yes |
| Reduction in displacement activity following the gesture | Absent | Present | yes |
| Association with greater morphological complexity | Absent | Present | yes |
| Party size | Small | Large | yes |
| Association with evolutionarily urgent contexts | Present | Absent | yes |
