The results , which partly confirm those obtained on a smaller dataset in Paggio and Navarretta ( 2010 ) , must be seen in light of the fact that our gesture annotation scheme comprises more fine-grained categories than most of the studies mentioned earlier for both head movements and face expressions .
feedback in head gesture and speech to appear in
Patrizia Paggio Costanza Navarretta
We find that prosodic features improve the classification of dialogue acts and that head gestures , where they occur , contribute to the semantic interpretation of feedback expressions . The results , which partly confirm those obtained on a smaller dataset in Paggio and Navarretta ( 2010 ) , must be seen in light of the fact that our gesture annotation scheme comprises more fine-grained categories than most of the studies mentioned earlier for both head movements and face expressions . The classification results improve , however , if similar categories such as head nods and jerks are collapsed into a more general category .
The results , which partly confirm those obtained on a smaller dataset in @@CITATION , must be seen in light of the fact that our gesture annotation scheme comprises more fine-grained categories than most of the studies mentioned earlier for both head movements and face expressions .