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Notions such as “corpus-driven” versus “theory-driven” bring into focus the specific role of corpora in linguistic research. As for phonology with its intrinsic focus on abstract categorical representation, there is a question of how a strictly corpus-driven approach can yield insight into relevant structures. Here we argue for a more theory-driven approach to phonology based on the concept of a phonological grammar in terms of interacting constraints. Empirical validation of such grammars comes from the potential convergence of the evidence from various sources including typological data, neutralization patterns, and in particular patterns observed in the creative use of language such as acronym formation, loanword adaptation, poetry, and speech errors. Further empirical validation concerns specific predictions regarding phonetic differences among opposition members, paradigm uniformity effects, and phonetic implementation in given segmental and prosodic contexts. Corpora in the narrowest sense (i.e. “raw” data consisting of spontaneous speech produced in natural settings) are useful for testing these predictions, but even here, special purpose-built corpora are often necessary.
This work exploited coarticulation and loud speech as natural sources of perturbation in order to determine whether articulatory covariation (motor equivalent behavior) can be observed inspeech that is not artificially perturbed. Articulatory analyses of jaw and tongue movement in the production of alveolar consonants by German speakers were performed. The sibilant /s/ shows virtually no articulatory covariation under the influence of natural perturbations, whereas other alveolar consonants show more obvious compensatory behavior. Our conclusion is that an effect of natural sources of perturbation is noticable, but sounds are affected to different degrees.