Poznań, Polonia
This study examined the cross-linguistic interactions of voiceless sibilants produced by multilingual speakers of Polish, English and Norwegian. The three languages divide their respective articulatory-acoustic space in three slightly different ways. We investigate the impact of English and Norwegian proficiencies on the center of gravity (CoG) of sibilants in read speech. Participants included 38 L1 Polish–L2 English–L3 Norwegian learners, and 10 L1 Norwegian–L2 English controls. Speech production data was obtained via an ordered language block paradigm (Norwegian English Polish), with language mode primed prior to sentence reading tasks using language-specific story retelling tasks. Linear mixed effects modelling revealed that the learners formed separate categories for phonemes sharing a place of articulation across languages. Various patterns of CLI were attested, with evidence of L1→L3 CLI and some evidence of L3→L2 CLI. There was orthographic interference in L3 Norwegian production for the three graphemes corresponding with Norwegian, particularly in the topmost L3 Norwegian proficiency group. Interestingly, Norwegian controls produced L1 Norwegian with a higher CoG than expected for a retroflex postalveolar, putting into question the retroflex characteristics of Norwegian.