Work within Hyper-Hypoarticulation Theory (H&H) and Communication Accommodation Theory (CAT) is increasingly focused on the adaptation of speech to the identity of the interlocutor (Koppen et al. 2017, Pardo et al. 2012, among others). These studies show a correlation between changes in the rate and spectral characteristics of speech (especially vowels) and the relationship between the speakers. Using the Diapix task (Baker & Hazan 2011), 10 Québec-French-speaking couples were invited to interact together and with two strangers, one French and one Québécois. This produced a corpus of 25h of speech and 121000 vowels. Spectral variations (especially hyper- / hypo- articulation), and changes in speech rate depending on the interlocutor, were studied using ((G)LMM) analysis. Our results reveal a correlation between the degree of social distance and speech reduction: the closer the interlocutors are (partners), the more speech is reduced.