Signal-Understanding (DAMSL): S explicitly indicates understanding (but not necessarily acceptance).OverallPositiveAutoFeedback (DIT): S wants A to know that S’s perception, interpretation, evaluation and application of the previous utterance were successful.Feedback_Positive (Verbmobil): The speaker reacts to a contribution of the dialogue partner in a positive way.  A FEEDBACK_POSITIVE can signal understanding of a previous contribution, acceptance of its contents or illocution, or it can express an answer to a yes/no-question… Note that FEEDBACK_POSITIVE and FEEDBACK_NEGATIVE are not meant as a dichotomy, but rather as two poles of a graded spectrum. Both FEEDBACK_POSITIVE and FEEDBACK_NEGATIVE are not necessarily reactions to a contribution made by a dialogue partner, but can also relate to an utterance the current speaker herself made.