The role of the Prosodic Hierarchy on learning phonological rules

We investigate the influence of the prosodic structure of German as first language (L1) on the application of the spirantization rule in Spanish as a second language (L2). According to the Prosodic Hierarchy, the prosodic domains in which phonological rules apply may vary according to whether the language has a grouping tendency or not. While Spanish spirantization (where /b d g/ are produced as [β ð ɣ] after continuant sounds) applies across the Intonational Phrase (IP), German restricts grouping processes to smaller domains, the largest of them being the phonological word (pword). We hypothesized that L1 German learners of Spanish apply spirantization progressively, starting from the pword. Twenty-six participants were recorded reading two texts with instances of /b d g/ within foot, pword, and IP. Results support that L1 German learners of Spanish spirantize mainly within feet, and less so within pwords and IPs; furthermore, consonants /b — d/ are more likely to be spirantized than /g/ across all contexts by more proficient learners. We conclude that the starting point of spirantization is not the largest one licensed by the learner’s L1, but that there is an L1-independent path where learners start from the smallest domain in the hierarchy.