The present book explores how phonological and phonetic knowl-
edge is represented and used in speech comprehension and produc-
tion. These processes are obviously quite different: In one case a per-
son hears and understands an acoustic input, whereas in the other
case, the person produces an acoustic signal expressing a message to
be conveyed. Therefore it is not surprising that many researchers
have studied phonological and phonetic processing in either speech
production or comprehension without considering the other process
too much. This "divide-and-conquer" strategy has been very success-
ful and has led to a wealth of empirical data and detailed production
and comprehension models.