Search Results (33)

Background/Objectives: While machine learning has made substantial strides in pronunciation detection in recent years, there remains a notable gap in the literature regarding research on improvements in the acquisition of speech sounds following a training intervention, especially in the domain of perception. This study addresses this gap by developing a deep learning algorithm designed to identify perceptual gains resulting from second language (L2) phonetic training. Methods: The participants underwent multiple sessions of high-variability phonetic training, focusing on discriminating challenging L2 vowel contrasts. The deep learning model was trained on perceptual data collected before and after the intervention. Results: The results demonstrated good model performance across a range of metrics, confirming that learners’ gains in phonetic training could be effectively detected by the algorithm. Conclusions: This research underscores the potential of deep learning techniques to track improvements in phonetic training, offering a promising and practical approach for evaluating language learning outcomes and paving the way for more personalized, adaptive language learning solutions. Deep learning enables the automatic extraction of complex patterns in learner behavior that might be missed by traditional methods. This makes it especially valuable in educational contexts where subtle improvements need to be captured and assessed objectively. Full article

Despite being fundamental for speech processing, L2 perceptual training often lacks attention in L2 classrooms, especially among English as Foreign Language (EFL) learners navigating complex English phonology. The current study investigates the impact of the blended phonetic training program incorporating HVPT features on enhancing L2 perception and listening comprehension skills in Korean elementary EFL learners. Fifty-seven learners, aged 11 to 12 years, participated in a four-week intervention program. They were trained on 13 challenging consonant phonemes for Korean learners, using multimedia tools for practice. Pre- and posttests assessed L2 perception and listening comprehension. They are grouped into three proficiency levels based on listening comprehension tests. The results showed significant improvements in L2 perception (p = 0.01) with small and in listening comprehension (p < 0.001) with small-to-medium effects. The lower proficiency students demonstrated the largest gains. The correlation between L2 perception and listening comprehension was observed both in pre- (r = 0.427 **) and posttests (r = 0.479 ***). Findings underscore the importance of integrating explicit phonetic instruction with HVPT to enhance L2 listening skills among EFL learners. Full article

Background/Objectives: Acromegaly is a rare chronic disease caused by excess growth hormone (GH) and insulin-like growth hormone 1 (IGF-1) due to a pituitary adenoma. In acromegaly patients, oral and facial manifestations, such as mandibular growth, macroglossia, and dental malocclusion, are common and can affect quality of life. The aims of the present study were to evaluate the diagnostic path of these patients, the impact that acromegaly had on their oral health, the medical figures involved, and the role played by their dentist. Methods: The data were collected via an anonymous questionnaire to study dental health, dental care, and acromegaly diagnosis and history and via validated questionnaires. The validated questionnaires used were the ESS (Epworth Sleepiness Scale) to assess daytime sleepiness, OHIP-14 (Oral Health Impact Profile-14) to study perceptions of oral health, and AcroQoL to explore quality of life. Results: We enrolled 90 acromegaly patients: 48% of the patients reported acromegaly oral manifestations and 73% reported facial changes. The most frequent oro-facial manifestations reported by the patients were jaw growth (41%), diastema (40%), macroglossia (39%), and increased size of cheekbones (35%). The median OHIP-14 value was 5 (min 0–max 43), and the highest values were recorded in the questions relating to pronunciation difficulties and problems eating due to dental problems, as well as discomfort with dental aesthetics. The patients’ sleep quality was rated as good by 33% of patients, decent by 47%, and bad by 20%. The median ACROQol score achieved by the patients was 69 (min 19, max 98). An inverse and statistically significant correlation was observed between OHIP-14 and AcroQoL scores (Spearman correlation coefficient—0.44, p = 0.0002). Conclusions: Oro-facial changes significantly affect quality of life in cases of acromegaly, yet dental professionals’ involvement in diagnosis and management is limited. Greater awareness among and integration of dental professionals could support earlier detection and improve patient outcomes. Full article

The COVID-19 pandemic resulted in the widespread adoption of online instruction all around the world. In fact, in the post-pandemic era, online teaching and learning are proliferating and are considered as alternatives to traditional learning. The current study investigated L2 learners’ perceptions of an online pronunciation course. Sixty L2 learners, ranging in age from 18 to 60, were recruited from different intensive English programs (IEPs) across the United States and six other countries, including India, Brazil, China, France, Russia, and Canada. The participants received online-based computer-assisted pronunciation training (CAPT) on Moodle over a period of three weeks and completed an online survey on Qualtrics. The results of the quantitative and qualitative data collected from the learners at the end of the course showed that the learners were highly satisfied with their own performance and that they found the online course highly useful and preferred it over a face-to-face pronunciation course. The findings provide valuable insights into the design and delivery of online courses for pronunciation teachers. The findings also suggest that CAPT can effectively support asynchronous L2 pronunciation teaching. Full article

This paper aims to investigate the Thai monophthong pronunciation of Chinese students speaking Thai as a second language (L2), and to examine how native Thai listeners perceived these Chinese-accented Thai monophthongs. This study involves an acoustic analysis targeted on the Thai monophthongs articulated by Chinese students of Thai (n = 15) in a picture description task in terms of duration and quality. The participants exhibited varying proficiency levels in different monophthongs, with the greatest difficulty being with Thai back monophthongs and certain central monophthongs, including /ɔ, ɔː/, /o, oː/, and /ɤː/. Moreover, a perception experiment among 30 native Thai listeners proved that Chinese students’ pronunciation of Thai monophthongs had varying levels of impact on accentedness perception. Specifically, /ɯ/, /ɤ/, /o/, /ɔ/, and their long counterparts significantly influenced accentedness perception. Conversely, /i/, /e/, /ɛ/, /a/, /u/, and their long counterparts showed less robustness in predicting the level of accentedness. Among the whole Thai monophthong inventory, teachers should prioritize those monophthongs that significantly influence accentedness perception for teaching Thai pronunciation to Chinese students. Full article

During conversation, speakers produce reduced speech, and this can create homophones: ‘we were’ and ‘we’re’ can both be realized as [ɚ], and ‘he was’ and ‘he’s’ can be realized as [ɨz]. We investigate the types of information non-native listeners (Dutch L1-English L2) use to perceive the tense of such verbs, making comparisons with previous results from native listeners. The Dutch listeners were almost as successful as natives (average percentage correct for ‘is’/’was’ in the most accurate condition: 81% for Dutch, 88% for natives). The two groups showed many of the same patterns, indicating that both make strong use of whatever acoustic information is available in the signal, even if it is heavily reduced. The Dutch listeners showed one crucial difference: a minimal amount of context around the target, just enough to signal speech rate, did not help Dutch listeners to recover the longer forms, i.e., was/were, from reduced pronunciations. Only the full utterance context (containing syntactic/semantic information such as ‘yesterday’ or another tensed verb) helped Dutch listeners to recover from reduction. They were not able to adjust their criteria based on the surrounding speech rate as native listeners were. This study contributes to understanding how L2 learners parse information from spontaneous speech in a World Englishes setting with inputs from multiple dialects. Full article

Arabic phonotactics significantly differ from English phonotactics in that they usually follow a framework that forbids the presence of consonant clusters in syllabic onsets. This study examines the relationship between Arabic-speaking EFL learners’ spelling accuracy and pronunciation, concentrating on the difficulties caused by consonant clusters in initial and final positions. A mixed-methods approach was employed, involving audio recordings to assess pronunciation accuracy and a spelling test to evaluate spelling performance. According to the results, words with initial consonant clusters (clusters at the beginning of a syllable, or onset) are harder to pronounce and spell than words with final consonant clusters (clusters that follow the vowel). Initial consonant clusters are considered to demand a quick transition in consonants at the start of a syllable, requiring more exact articulation. On the other hand, final clusters allow for a more progressive and straightforward articulation by involving a consonant transition following the initial vowel sound. Additionally, epenthesis may be used as a method to break up consonant clusters in L1 phonological interference, which is consistent with Arabic phonotactic patterns. Full article

Objective: This study investigated the degrees of lenition, or consonantal weakening, in the production of Spanish stop consonants by native English speakers during a study abroad (SA) program. Lenition is a key phonological process in Spanish, where voiced stops (/b/, /d/, /ɡ/) typically weaken to fricatives or approximants in specific phonetic environments. For L2 learners, mastering this subtle process is essential for achieving native-like pronunciation. Methods: To assess the learners’ progress in acquiring lenition, we employed Phonet, a deep learning model. Unlike traditional quantitative acoustic methods that focus on measuring the physical properties of speech sounds, Phonet utilizes recurrent neural networks to predict the posterior probabilities of phonological features, particularly sonorant and continuant characteristics, which are central to the lenition process. Results: The results indicated that while learners showed progress in producing the fricative-like variants of lenition during the SA program and understood how to produce lenition in appropriate contexts, the retention of these phonological gains was not sustained after their return. Additionally, unlike native speakers, the learners never fully achieved the approximant-like realization of lenition. Conclusions: These findings underscore the need for sustained exposure and practice beyond the SA experience to ensure the long-term retention of L2 phonological patterns. While SA programs offer valuable opportunities for enhancing L2 pronunciation, they should be supplemented with ongoing support to consolidate and extend the gains achieved during the immersive experience. Full article

Pronunciation is crucial to L2 learning. However, achieving speech proficiency is difficult. Class time constraints make demonstration–imitation pronunciation teaching methods less effective, even after repeated practice. Research suggests that pronunciation involves motor control, that auditory preparation enhances accuracy, and that learners produce more accurate pronunciation after perceiving accurate target sounds. This study proposes that the perception of accurate L2 target sounds will enhance pronunciation. To test this concept, the study employed online auditory training tasks for English learners enrolled at a private university in Taiwan. The results showed that auditory teaching results in positive learning outcomes. Full article

The present study analyses the production rates of stop-unrelease amongst advanced French learners of English before and after training. Although stop-unrelease may be regarded as a minor issue in English pronunciation teaching, it has received some attention in recent years. Earlier studies showed that amongst “phonetically naive English listeners”, the lack of release of /p/, /t/ and /k/ leads to lower identification scores. The present study analyses the speech of 31 French university students majoring in English to measure the efficiency of an awareness approach on the production of stop-unrelease. The experiment comprised three phases with a test and a control group. During Phase 1, both groups were asked to read pairs of words and sentences containing medial and final voiceless stops. We chose combinations of two identical stops (homorganic) or stops with different places of articulation (heterorganic), as well as stops in utterance-final position. Namely, wait for me at that table over there, that pan, or I like that truck. In Phase 2, one group watched an explanatory video to increase awareness on stop-unrelease in English before reading Phase 1 words and sentences a second time. The remaining group was the control group and did not receive any training. Among the participants, 17 read a French text containing pairs of stops in similar positions to those in the English one, which served as an L1 baseline. In total, six students continued until Phase 3 (reading the same stimuli a month later; three in the control group and three in the test group). The results showed that sentence-final stops were overwhelmingly released (above 90%) in both English and French in Phase 1. Training had a significant impact on sentence-final stop-unrelease (p < 0.001), which rose from 9.65% to 72.2%. Progress was also visible in other contexts as in heterorganic pairs of stops. Based on these results, we strongly recommend the combined use of spectrograms and gestures to raise awareness in a classroom or for online learning so as to reach multiple learner profiles and further increase efficiency in pronunciation learning. Full article

The communicative approach to language learning, a teaching method commonly used in second language (L2) classrooms, places little to no emphasis on pronunciation training. As a result, mobile-assisted pronunciation training (MAPT) platforms provide an alternative to classroom-based pronunciation training. To date, there have been several meta-analyses and systematic reviews of mobile-assisted language learning (MALL) studies, but only a few of these meta-analyses have concentrated on pronunciation. To better understand MAPT’s impact on L2 learners’ perceptions and production of targeted pronunciation features, this study conducted a systematic review of the MAPT literature following PRISMA 2020 guidelines. Potential mobile-assisted articles were identified through searches of the ERIC, Educational Full Text, Linguistics and Language Behavior Abstract, MLI International, and Scopus databases and specific journal searches. Criteria for article inclusion in this study included the following: the article must be a peer-reviewed empirical or quasi-empirical research study using both experimental and control groups to assess the impact of pronunciation training. Pronunciation training must have been conducted via MALL or MAPT technologies, and the studies must have been published between 2014 and 2024. A total of 232 papers were identified; however, only ten articles with a total of 524 participants met the established criteria. Data pertaining to the participants used in the study (nationality and education level), the MPAT applications and platforms used, the pronunciation features targeted, the concentration on perception and/or production of these features, and the methods used for training and assessments were collected and discussed. Effect sizes using Cohen’s d were also calculated for each study. The findings of this review reveal that only two of the articles assessed the impact of MAPT on L2 learners’ perceptions of targeted features, with results indicating that the use of MPAT did not significantly improve L2 learners’ abilities to perceive segmental features. In terms of production, all ten articles assessed MPAT’s impact on L2 learners’ production of the targeted features. The results of these assessments varied greatly, with some studies indicating a significant and large effect of MAPT and others citing non-significant gains and negligible effect sizes. The variation in these results, in addition to differences in the types of participants, the targeted pronunciation features, and MAPT apps and platforms used, makes it difficult to conclude that MAPT has a significant impact on L2 learners’ production. Furthermore, the selected studies’ concentration on mostly segmental features (i.e., phoneme and word pronunciation) is likely to have had only a limited impact on participants’ intelligibility. This paper provides suggestions for further MAPT research, including increased emphasis on suprasegmental features and perception assessments, to further our understanding of the effectiveness of MAPT for pronunciation training. Full article

In recent decades, a vast literature has documented crosslinguistic influences on the acquisition of L2 phonology and in particular the effects of spelling on pronunciation. However, articulating these research findings in terms of taking into account the effects of L1 phonology and spelling on L2 pronunciation in language teaching remains to be examined. These studies are based on experimental cross-sectional methods and mainly focus on L2 English learning by speakers of languages with an alphabetic system. In French, there are few studies on crosslinguistic influences on the acquisition of the nasal vowels (//, // and /$\tilde{\epsilon }$/) and few experimental studies that point to a possible effect of orthography on the pronunciation of these phonemes. The results of experimental studies are difficult to transpose to the language classroom because they are based on word or sentence reading and writing activities, which are quite far-removed from the conversational activities practised in the classroom in interaction with peers and the teacher. Hence, we opted here for a case study of the effect of spelling on the production of nasal vowels in interaction tasks. We conducted a longitudinal study during the first year of extensive learning of French (4 h 30 per week). The results of a perceptive analysis by expert listeners show that (i) learners spell nasal vowels with an <n> or <m> in 98% of the obligatory contexts; (ii) most nasal vowels are perceived as nasal vowels in speech (72%), the others being perceived as vowels followed by a nasal consonant (19.5%) or as oral vowels (8.5%); (iii) consonantisation is stronger when the learner spontaneously produces a word than when (s)he repeats it, (iv) which decreases with time (learning effect) and varies (v) according to the consonant, /$\tilde{\epsilon }$/ being less consonantised than // and //. Finaly, we propose a didactic discussion in the light of intelligibility and influence of orthography. Full article

Little attention is paid to prosody in second language (L2) instruction, but computer-assisted pronunciation training (CAPT) offers learners solutions to improve the perception and production of L2 suprasegmentals. In this study, we extend with acoustic analysis a previous research showing the effectiveness of self-imitation training on prosodic improvements of Japanese learners of Italian. In light of the increased degree of correct match between intended and perceived pragmatic functions (e.g., speech acts), in this study, we aimed at quantifying the degree of prosodic convergence towards L1 Italian speakers used as a model for self-imitation training. To measure convergence, we calculated the difference in duration, F0 mean, and F0 max syllable-wise between L1 utterances and the corresponding L2 utterances produced before and after training. The results showed that after self-imitation training, L2 learners converged to the L1 speakers. The extent of the effect, however, varied based on the speech act, the acoustic measure, and the distance between L1 and L2 speakers before the training. The findings from perceptual and acoustic investigations, taken together, show the potential of self-imitation prosodic training as a valuable tool to help L2 learners communicate more effectively. Full article

In this article, we explore the possibility of evaluating L2 pronunciation, and, more specifically, L2 vowels, without referring to a native model, i.e., intrinsically. Instead of comparing L2 vowel productions to native speakers’ productions, we use Pillai scores to measure the overlap between target vowel categories in L2 English (/iː/ — /ɪ/, /ɑː/ — /æ/, /ɜː/ — /ʌ/, /uː/ — /ʊ/) for L1 French, L1 Spanish, and L1 Italian learners (n = 40); and in L2 French (/y/ — /u/, /ø/ — /o/, /ø/ — /e/, /$\tilde{\mathtt{\varepsilon }}$/ — /e /, /$\widetilde{\mathtt{ɑ}}$/ — /a/, /$\widetilde{\mathtt{ɔ}}$/ — /o/) for L1 English, L1 Spanish, and L1 Italian learners (n = 48). We assume that a greater amount of overlap within a contrast indicates assimilated categories in a learner’s production, whereas a smaller amount of overlap indicates the establishment of phonological categories and distinct realisations for members of the contrast. Pillai scores were significant predictors of native ratings of comprehensibility and/or nativelikeness for many of the contrasts considered. Despite some limitations and caveats, we argue that Pillai scores and similar methods for the intrinsic evaluation of L2 pronunciation can be used, (i) to avoid direct comparisons of L2 users’ performance with native monolinguals, following recent trends in SLA research; (ii) when comparable L1 data are not available; (iii) within longitudinal studies to track the progressive development of new phonological categories. Full article

Little work has examined the L2 acquisition of Spanish stress, and especially the production of its acoustic correlates, and the work that has is largely limited to inexperienced learners. This study examines the production of stress by L1 English/L2 Spanish speakers who are highly experienced with their L2, having lived much of their adult lives as immigrants in Spain. Data were collected from the reading of a short story, an extended reading with a plot was provided so that participants would not be focused on their pronunciation, thus producing speech closer to spontaneous speech while still allowing for control over what they produced. Intensity, duration, pitch and deaccenting were examined and the results from the L2 learners were compared to a control group of native speakers from Spain who performed the same task. While only one L2 learner’s stress production could be classified as completely native-like, as a group, their stress production approximated native speaker norms to a greater degree than has been found for most other aspects of L2 Spanish pronunciation in previous research. Nonetheless, L2 learners seemed to transfer duration patterns from their L1 into their L2 Spanish and also deaccented stressed syllables nearly twice as often as native speakers. Full article