Details on the stimuli used for the experimental task are much needed. Please describe the sentences used at the acoustic and phonological level, for all varieties, and provide a list of these sentences. Importantly, were they controlled at the syntactic and lexical levels to ensure that potential differences in processing speed were not due to syntactic or lexical factors? On a related note, and crucially to interpret your results, how can we be sure that listeners responded based on the intonational cues they perceived and not on potential syntactic and lexical cues in the sentences?
Action: acoustic analysis, supplemental materials