The early phase of /ɹ/ production development in adult Japanese learners of English

Although previous research indicates that Japanese speakers’ second-language (L2) perception and production of English /ɹ/ may improve with increased L2 experience, relatively little is known about the fine phonetic details of their /ɹ/ productions, especially during the early phase of L2 speech learning. This cross-sectional study examined acoustic properties of word-initial /ɹ/ from 60 Japanese learners with a length of residence (LOR) between one month and one year in Canada. Their performance was compared to that of 15 native speakers of English and 15 low-proficiency Japanese learners of English. Formant frequencies (F2 and F3) and F1 transition durations were evaluated under three task conditions—word reading, sentence reading, and timed picture description. Learners with as little as two to three months of residence demonstrated target-like F2 frequencies. In addition, increased LOR was predictive of more target-like transition durations. Although the learners showed some improvement in F3 as a function of LOR, they did so mainly at a controlled level of speech production. The findings suggest that during the early phase of L2 segmental development, production accuracy is task-dependent and is influenced by the availability of L1 phonetic cues for redeployment in L2

Accounting for multicompetence and restructuring in the study of speech

Phonetic studies meant to generalize to monolingual speakers of a target language have often examined individuals with considerable experience using another language, such as the immigrant native speaker. This paper presents, first, results from a meta-analysis of the literature, suggesting that conflation of ostensibly bilingual (“multicompetent”) individuals with monolinguals remains common practice and, second, longitudinal data on speech production that demonstrate why this practice is problematic. Adult native English speakers recently arrived in Korea showed significant changes in acoustic properties of their English production during their first weeks of learning Korean (“phonetic drift”) and, furthermore, continued to show altered English production a year later, months after their last Korean class and without extensive use of Korean in daily life. These patterns suggest that the linguistic experience associated with residence in a foreign language environment tends to induce and then prolong phonetic drift of the native language, making the multicompetent native speaker living in a foreign language environment unrepresentative of a monolingual in the native language environment. The speed and persistence of these effects highlight the need for language researchers to be explicit about the population under study and to accordingly control (and describe) language background in a study sample.https://drive.google.com/open?id=0B1_NoAiLQlnkbDEyb2M0ckRodGsOthe

Global accent in the portuguese speech of heritage returnees

The present study examined whether heritage speakers (HSs) of European Portuguese (EP) who were born or moved to a German-speaking country before the age of eight years were perceived as native speakers of EP. In particular, this study intended to determine whether a change of linguistic environment, length of residence in a migrant context, length of residence in the country of origin before migration and after remigration, and age at return could predict the degree of (non)native accent in the heritage language. Thirty native Portuguese speakers assessed the global accent of 20 Portuguese-German bilinguals, five Portuguese monolinguals and five highly proficient German speakers of Portuguese as a second language (L2). The group of HSs comprised 17 speakers who returned to Portugal. The results revealed that listeners perceived a strong global foreign accent in the speech of the L2 learners, while the monolingual Portuguese speakers were clearly perceived as being native speakers of EP. The HSs’ ratings were considerably closer to the monolingual average ratings, but they showed more variation, indicating that their accent may bear non-native traces. Further analyses showed that the age at which the HSs emigrated was the only significant predictor, while length of residence in the host country and in Portugal were less predictive.FC

The Perception of Complex Onsets in English: Universal Markedness?

Second language (L2) learners of English whose native languages have relatively simple syllable structure have a strong tendency to modify complex onsets in production. Past studies have shown that such modification is often correlated with sonority-based markedness. According to this principle, the marked bi-consonantal sequences are such that the sonority distance between the first consonant and the subsequent consonant is relatively small. For instance, /pl/ is considered to be less marked than /bl/ since the former has larger sonority distance. A question of interest here is whether such “markedness” would be applicable to the perception of complex onsets by Japanese-speaking learners of English. The current study tested Japanese L2 learners and American English controls in a categorial ABX discrimination test of 8 contrasts between nonsense words with consonant cluster onsets CC(C)VCV vs. CVC(C)VCV sequences (e.g., /spani/ vs. /sepani/) and included /sp, sk, pl, bl, kl, gl, spl, skl/ clusters. Results showed that overall accuracy by Japanese listeners was significantly poorer than for the Americans (72 % and 98% correct, respectively). Certain clusters were harder for Japanese listeners (e.g., 76% correct for /pl/ but 64% for /bl/). However, in general, relative difficulty was not accurately predicted by sonority-based markedness. Alternative hypotheses for relative perceptual difficulties include the acoustic characteristics of the stimulus materials and effects of native phonological structures

A comparison between Full Time Equivalent and Length of Residence as measurements of time in bilingual speech research : the case of first language attrition

Full Time Equivalent (FTE), a product of Length of Residence (LOR) in L2 contexts multiplied by an index of frequency of L2 use, has been considered to be an important factor in bilingual speech development (Flege & Bohn, 2021). This work, therefore, seeks to analyze changes in the Voice Onset Time (VOT) of Brazilian Portuguese-L1 (short lag) in contexts of English-L2 (long lag) as a function of LOR and FTE (N=44) through Bayesian linear regression models with mixed effects. As a result, the models showed a positive effect of time on VOT values, with VOT values increasing over LOR. However, the models that used FTE yielded greater effects with greater credibility. We conclude that LOR underestimates the effect of time, making FTE a more accurate metric since it incorporates both ‘time’ and ‘language use’

Age Effects in Spoken Second Language Vocabulary Attainment Beyond the Critical Period

The current study set out to examine to what degree age of acquisition (AOA), defined as a learner’s first intensive exposure to a second language (L2) environment, mediates the final state of post-pubertal, spoken vocabulary attainment. In Study 1, spontaneous speech samples were elicited from experienced Japanese users of English (n = 41) using story-telling and interview tasks. The samples were analyzed using a range of corpus- and rater-based lexical measures, and compared to the speech of inexperienced Japanese speakers (n = 40) and native speakers of English (n = 10). The results showed that most experienced L2 learners tended to demonstrate nativelike proficiency for relatively easy lexical dimensions of speech (i.e., richness), but that AOA appeared to play a key role in predicting the ultimate attainment of relatively difficult lexical dimensions (i.e., appropriateness). In Study 2, the findings were successfully replicated with experienced L1 Polish users of English (n = 50)

Sociolinguistic Conditioning of Phonetic Category Realisation in Non-Native Speech

The realisation of phonetic categories reflects a complex relationship between individual phonetic parameters and both linguistic and extra-linguistic conditioning of language usage. The present paper investigates the effect of selected socio-linguistic variables, such as the age, the amount of language use and cultural/social distance in English used by Polish immigrants to the U.S. Individual parameters used in the realisation of the category ‘voice’ have been found to vary in their sensitivity to extra-linguistic factors: while the production of target-like values of all parameters is related to the age, it is the closure duration that is most stable in the correspondence to the age and level of language proficiency. The VOT and vowel duration, on the other hand, prove to be more sensitive to the amount of language use and attitudinal factors

Experience effects on the development of late second language learners’ oral proficiency

The aim of this study is to evaluate the effects of language experience—operationalized as length of residence—on late second language learners. Data collected from 65 participants consists of three groups of Japanese learners of English (n = 13 Short-, Mid-, Long-LOR Groups, respectively) and two groups of baseline speakers (n = 13 for inexperienced Japanese speakers and native English speakers, respectively). The global quality of their spontaneous speech production was initially judged by 10 native speaking raters of English based on accentedness (linguistic nativelikeness) and comprehensibility (ease of understanding), and then submitted to segmental, prosodic, temporal, lexical, and grammatical analyses. According to the results, LOR was generally predictive of improved L2 comprehensibility as a result of the continuous development of good prosody, optimal speech rate, and proper lexicogrammar usage, while a great amount of L2 experience was required to enhance accentedness, which entailed refined segmental accuracy, vocabulary richness, and grammatical complexity. These results, in turn, suggest L2 learners continue to improve L2 oral proficiency over an extensive period of L2 immersion (e.g., 6 years of LOR), and they do so by paying selective attention to certain linguistic domains closely linked to comprehensibility—but not necessarily relevant to accentedness—for the purpose of successful L2 communication

Roles of domain-general auditory processing in spoken second-language vocabulary attainment in adulthood

Recently, scholars have begun to explore the hypothesis that individual differences in domain-general auditory perception, which has been identified as an anchor of L1 acquisition, could explain some variance in postpubertal L2 learners’ segmental and suprasegmental learning in immersive settings. The current study set out to examine the generalizability of the topic to the acquisition of higher-level linguistic production skills—that is the appropriate use of diverse, rich, and abstract vocabulary. The speech of 100 Polish-English bilinguals was elicited using an interview task, submitted to corpus-/rater-based linguistic analyses, and linked to their ability to discriminate sounds based on individual acoustic dimensions (pitch, duration, and amplitude). According to the results, those who attained more advanced L2 lexical proficiency demonstrated not only more relevant experience (extensive immersion and earlier age of arrival), but also more precise auditory perception ability