Second language (L2) scholars generally agree that pronunciation development should prioritize understandable over
nativelike speech. However, which linguistic features enable understanding lacks clarity. While monologic research indicates a
combined effect of segmental and suprasegmental measures, interactive research has emphasized a segmental focus. The current study
takes a step in addressing this divide by applying a monologic methodology to interactive speech. 20 L2 English learners completed
one interactive and three monologic tasks. 36 native listeners rated each speaker per task for comprehensibility. I additionally
coded all utterances for a series of phonological and fluency measures. Surprisingly, segmental and suprasegmental measures had
minimal impact on listerners’ ratings. Instead, ratings for the two more linguistically-constrained monologic tasks demonstrated
stronger associations with fluency measures than the less-constrained monologic and interactive tasks. This finding is likely an
effect of (a) increased cognitive task demands placed on speakers, and (b) listener familiarity with L2 English speech.
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