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This site is about the ANR project "Conversational Feedback". In a conversation, feedback is mostly performed through short utterances produced by another participant than the main current speaker. These utterancesare among the most frequent in conversational data. They are also considered ascrucial communicative tools for achieving coordination in dialogue. They havebeen the topic of various descriptive studies and often given a central role inapplications such as dialogue systems. The present project addresses this issuefrom a linguistic viewpoint and combines fine-grained corpus analyses of semi-controlled data with formal and statistical modeling.