The pause as a fundamental feature of speech fulfils a number of functions; some of these are relevant for the speaker, others are important for the listener. For interpreters as a specific category of listeners pauses in the source speech play an essential role, their length and frequency affecting interpreters' performance.
Characteristic differences in the distribution of pauses have been identified between spontaneous speech to prepared texts being read aloud. Importantly, interpreters' subjective perception of the length and frequency of pauses in these two types of speech deviates from the real values, which may in fact be virtually identical; interpreters' subjective perception of the length of pauses then often translates into their perception of the rate of the speech and its difficulty.