
Chapter | 4 Natural Language and Dialogue Processing
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mainly to enlarge the set of available data and to predict the behaviour
of the SDS in unseen situations.Among simulation methods presented
in the literature, one can distinguish between state-transition methods
as proposed in [54] and methods based on modular simulation envi-
ronments as described in [48, 58–60]. The first type of method is more
task-dependent as well as the hybrid method proposed in [85]. One
can also distinguish methods according to the level of abstraction in
which the simulation takes place. While [59, 86] models the dialog at
the acoustic level, most of other methods [48, 54, ...