Journal of Second Language Pronunciation - Online First

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.

This experimental study aimed to determine the impact of mobile-based Automatic Speech Recognition (ASR) in Gmail on intelligibility and proficiency, as well as whether any individual factors influenced learning outcomes. It focused on 26 Intermediate learners of French as a foreign language enrolled in two university courses geared towards the development of advanced oral skills but with different approaches to integrated instruction. It innovatively combined human-based and machine-based ratings within an ecological paradigm, following Levis’s (2005) intelligibility principle and Thomson and Derwing’s (2015) call for research that is readily useful for language instructors. Results show that ASR users significantly outperformed non-ASR users on intelligibility, particularly when exposed to instruction on spelling-to-sound patterns, and demonstrated the biggest growth in proficiency. Gender was also found to impact results. Pedagogical implications and venues for future research are offered.

Research on segmentals has suggested that a key component of High Variability Phonetic Training (HVPT) is high talker variability. However, the extent to which high talker variability improves perception of tones is unclear. This study examined the effects of high talker variability on the perception of Mandarin tones (Tones 1–4) by English-speaking listeners. A training paradigm that used multiple talkers (multitalker group) was compared with a paradigm that used one talker (single-talker group). The results showed that the multitalker group outperformed the single-talker group, and they retained their learning better than the single-talker group did for 6 months. Neither group, however, improved their perception of Tone 1 or generalized their learning of monosyllables to disyllables. The results suggest that although high talker variability can effectively improve tone perception, it does not improve the perception of more tone categories or yield generalization of learning to more contexts compared to low talker variability.

We present a study of the development of L2 stop VOT (voice onset time) in lower-level English-speaking learners of Spanish over the course of a college semester. Participants were recorded six times in two-week intervals. Halfway through the semester, students received a brief pronunciation training session with practice and feedback. Overall, the learners did not lower their L2 VOTs in the first half of the study, before pronunciation training. Following training, however, they lowered their mean VOTs for Spanish voiceless stops significantly. A similar effect was not found for their mean VOTs of Spanish voiced stops, in line with prior work suggesting that prevoicing may be harder to acquire. Yet careful examination suggests that learners are increasing the frequency with which they use prevoicing in Spanish, suggesting this metric might inform future work on L2 Spanish pronunciation development. This work has implications for teaching and research in second language pronunciation.

In both research and educational settings, native and non-native speakers are often asked to make foreign accent ratings (FARs) as a measure of second language pronunciation. However, previous research has identified several factors that influence these ratings. The current study investigates one such variable that, to date, has received little attention in the literature: personality. Thirty-six monolingual English speakers completed the Big Five Aspects Scales personality test ( DeYoung, Quilty, & Peterson, 2007 ) and provided accentedness ratings for 15 non-native English speakers (L1 Mandarin) and five native controls. Results show that two of the Big Five personality traits – conscientiousness and extraversion – were significantly correlated with the ratings listeners provided, while another trait – agreeableness – approached significance. These findings further underline the need to interpret FARs with caution, as variables unrelated to foreign accent, in this case listeners’ personality, may be associated with these ratings, as well.

This study investigated whether second language (L2) speakers are aware of and can manipulate aspects of their speech contributing to comprehensibility. Forty Mandarin speakers of L2 English performed two versions of the same oral task. Before the second task, half of the speakers were asked to make their speech as easy for the interlocutor to understand as possible, while the other half received no additional prompt. Speakers self-assessed comprehensibility after each task and were interviewed about how they improved their comprehensibility. Native-speaking listeners evaluated speaker performances for five dimensions, rating speech similarly across groups and tasks. Overall, participants did not become more comprehensible from task 1 to task 2, whether prompted or not, nor did speakers’ self-assessments become more in line with raters’, indicating speakers may not be aware of their own comprehensibility. However, speakers who did demonstrate greater improvement in comprehensibility received higher ratings of flow, and speakers’ self-ratings of comprehensibility were aligned with listeners’ assessments only in the second task. When discussing comprehensibility, speakers commented more on task content than linguistic dimensions. Results highlight the roles of task repetition and self-assessment in speakers’ awareness of comprehensibility.