Methods for investigation of L2 speech rhythm: Insights from the production of English speech rhythm by L2 Arabic learners

Rhythm metrics can detect second language development of target-like speech rhythm but interpretation the results from in learners’ is problematic because mapping to underpinning phonological features indirect. We investigate first (L1) Arabic / (L2) English, which differ key properties contributing percept rhythm: unstressed vowel reduction and syllable structure. Our production data are interpreted using additional measures, stressed vowels consonant cluster realization, alongside standard metrics; this combination facilitates disambiguation competing interpretations metric results. The findings confirm importance multiple study L2 demonstrate how simple measures guide their In showed that produced by speakers, regardless length residence UK, exhibited lower vocalic durational variability than native English speakers. However, closer inspection degree nonnative groups confirms no single captures complex nature observed patterns. Future studies advised not draw firm conclusions about realization based solely on metrics.