Prosodic boundary cues in German: Evidence from the production and perception of bracketed lists
Résumé
This study investigates prosodic phrasing of bracketed lists in German. We analyze variation in pauses,
phrase-final lengthening and f0 in speech production and how these cues affect boundary perception. In line
with the literature, it was found that pauses are often used to signal intonation phrase boundaries, while final
lengthening and f0 are employed across different levels of the prosodic hierarchy. Deviations from
expectations based on the standard syntax-prosody mapping are interpreted in terms of task-specific effects.
That is, we argue that speakers add/delete prosodic boundaries to enhance the phonological contrast
between different bracketings in the experimental task. In perception, three experiments were run, in which
we tested only single cues (but temporally distributed at different locations of the sentences). Results from
identification tasks and reaction time measurements indicate that pauses lead to a more abrupt shift in
listeners' prosodic judgments, while f0 and final lengthening are exploited in a more gradient manner. Hence,
pauses, final lengthening and f0 have an impact on boundary perception, though listeners show different
sensitivity to the three acoustic cues.
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