Penser tout haut. Analyse multimodale de fins de séquences conversationnelles

National audience This paper proposes a multimodal analysis of thoughts spoken out loud by which speakers show some degree of inattention to the current conversation. The sequences under study have been detected in the video files of conversational CID, recorded at the LPL, mainly thanks to the unfocused and fixed gaze of speakers. An analysis showed that all the sequences under study share prosodic properties (in terms of F0 and intensity range and span ; presence of pause before and after the sequences). Gesturally speaking the speakers' fixedness of gaze is paralleled by a completely relaxed attitude of the body and absence of any hand gesture. A discourse analysis of the utterances shows that they are all post-closing sequences (rather than closing sequences proper) and that they appear before a topic change. Cet article propose une analyse multimodale des productions orales relevant de la pensée à voix haute par laquelle le locuteur montre un certain degré d'inattention à la tâche conversationnelle en cours. L'étude porte sur des séquences vidéo tirées du corpus CID, enregistré au Laboratoire Parole et Langage.