The role of discourse context frequency in phonological variation: A usage-based approach to bilingual sepech production

Missing from the body of literature on contact induced phonological influence are studies that examine language variation as it occurs in speech production among members of a speech community. This study uses a corpus of naturally occurring Spanish/English code-switched discourse to determine whether cross-language phonological effects are evident in the data. Specifically, 2,629 tokens of word-initial /d/ were analyzed in spontaneous interactions to identify the linguistic factors that condition the variable reduction (unreduced [d], reduced [ð]/Ø) of /d-/ in Spanish words. Cognate words (doctor) were found to reduce significantly less often than non-cognate words (después ‘after’). Additionally, a significant effect is found for a novel, contextually informed measure that estimates words’ proportion of use in online contexts promoting reduction (FFC – Frequency in a Favorable Context). The greater a word’s prior exposure to online contexts promoting reduction, the greater the likelihood of reduced articulations. Indeed, this work argues that the distinction between cognates and non-cognates in fact emerges through this cumulative effect of significantly different patterns of use in discourse. Cognate /d/ words are used overall (considering speakers’ use of both English and Spanish) less often in contexts that promote reduction than non-cognate words. As a result of the diminished net exposure to reducing environments, per usage-based grammar, the lexical representations of cognate words have strengthened non-reduced exemplars ([d]). The distinct rates of variation for the word categories thus emerge from distinct usage patterns. This paper proposes such a focus on usage patterns within naturally occurring speech for phonological analyses within contact linguistics.