Producing and perceiving socially structured coarticulation: Coarticulatory nasalization in Afrikaans

Most theories of phonetics assume a tight relation between production and perception, and recent years have also seen increasing evidence for such a relation at the level of the individual. For the most part, however, this evidence comes from socially homogeneous speech communities where the targeted pattern of variation is mostly socially neutral. What implications might socially structured phonetic variation in the speech community have for the perception-production link? If listeners can predict the phonetic patterns of a talker based on the talker's actual or assumed identity, would they adjust their perceptual strategies accordingly, possibly weakening the link between their own production and perception patterns? This study reports the results of a pair of experiments that investigate the production and perception of coarticulatory vowel nasalization in Afrikaans, a language for which variation in coarticulatory nasalization is socially structured. Relying on nasal airflow measures, the production experiment showed that speakers of White Afrikaans produce more extensive coarticulatory nasalization than speakers of Kleurling Afrikaans. The perception experiment used an eye-tracking paradigm to assess listeners' perceptual reliance on coarticulatory nasalization, and found (i) that Afrikaans speakers' use of coarticulatory nasalization in production predicts their perceptual reliance on this information, (ii) that they rapidly adjust to the coarticulatory timing patterns in the speech of other speakers, but also (iii) that they do not adjust their perceptual reliance on coarticulation in response to the assumed identity of the speaker. The link between perception and production therefore persists, even in this situation of socially structured variation in coarticulatory timing.