Pavel Trofimovich

Disentangling accent from comprehensibility

The goal of this study was to determine which linguistic aspects of second language speech are related to accent and which to comprehensibility. To address this goal, 19 different speech measures in the oral productions of 40 native French speakers of English were examined in relation to accent and comprehensibility, as rated by 60 novice raters and three experienced teachers. Results showed that both constructs were associated with many speech measures, but that accent was uniquely related to aspects of phonology, including rhythm and segmental and syllable structure accuracy, while comprehensibility was chiefly linked to grammatical accuracy and lexical richness.

Deconstructing comprehensibility: identifying the linguistic influences on listeners' L2 comprehensibility ratings

Comprehensibility, a major concept in second language (L2) pronunciation research that denotes listeners’ perceptions of how easily they understand L2 speech, is central to interlocutors’ communicative success in real-world contexts. Although comprehensibility has been modeled in several L2 oral proficiency scales—for example, the Test of English as a Foreign Language (TOEFL) or the International English Language Testing System (IELTS)—shortcomings of existing scales (e.g., vague descriptors) reflect limited empirical evidence as to which linguistic aspects influence listeners’ judgments of L2 comprehensibility at different ability levels. To address this gap, a mixed-methods approach was used in the present study to gain a deeper understanding of the linguistic aspects underlying listeners’ L2 comprehensibility ratings. First, speech samples of 40 native French learners of English were analyzed using 19 quantitative speech measures, including segmental, suprasegmental, fluency, lexical, grammatical, and discourse-level variables. These measures were then correlated with 60 native English listeners’ scalar judgments of the speakers’ comprehensibility. Next, three English as a second language (ESL) teachers provided introspective reports on the linguistic aspects of speech that they attended to when judging L2 comprehensibility. Following data triangulation, five speech measures were identified that clearly distinguished between L2 learners at different comprehensibility levels. Lexical richness and fluency measures differentiated between low-level learners; grammatical and discourse-level measures differentiated between high-level learners; and word stress errors discriminated between learners of all levels.

Child-adult differences in second-language phonological learning: the role of cross-language similarity.

This study evaluated whether age effects on second language (L2) speech learning derive from changes in how the native language (L1) and L2 sound systems interact. According to the “interaction hypothesis” (IH), the older the L2 learner, the less likely the learner is able to establish new vowel categories needed for accurate L2 vowel production and perception because, with age, L1 vowel categories become more likely to perceptually encompass neighboring L2 vowels. These IH predictions were evaluated in two experiments involving 64 native Korean- and English-speaking children and adults. Experiment 1 determined, as predicted, that the Korean children were less likely than the Korean adults to perceive L2 vowels as instances of a single L1 vowel category. Experiment 2 showed that the Korean children surpassed the Korean adults in production of certain vowels but equaled them in vowel perception. These findings, which partially support the IH, are discussed in relation to L2 speech learning.

Learning prosody and fluency characteristics of second language speech: The effect of experience on child learners' acquisition of five suprasegmentals

This study examined second language (L2) experience effects on childrens acquisition of fluency-(speech rate, frequency, and duration of pausing) and prosody-based (stress timing, peak alignment) suprasegmentals. Twenty Korean children (age of arrival in the United States = 7–11 years, length of US residence = 1 vs. 11 years) and 20 age-matched English monolinguals produced six English sentences in a sentence repetition task. Acoustic analyses and listener judgments were used to determine how accurately the suprasegmentals were produced and to what extent they contributed to foreign accent. Results indicated that the children with 11 years of US residence, unlike those with 1 year of US residence, produced all but one (speech rate) suprasegmentals natively. Overall, findings revealed similarities between L2 segmental and suprasegmental learning.

Comprehension-Based Practice: The Development of L2 Pronunciation in a Listening and Reading Program.

We report the results of a 2-year longitudinal comparison of grade 3 and grade 4 English-as-a-second-language learners in an experimental, comprehension-based program and those in a regular (i.e., more typical) language learning program. The goal was to examine the extent to which sustained, long-term comprehension practice in both listening and reading—in the virtual absence of any speaking—can help develop learners’ second language (L2) pronunciation. We analyzed learners’ sentences from an elicited imitation task using several accuracy and fluency measures as well as listener ratings of accentedness, comprehensibility, and fluency. We found no differences between the two programs at the end of year 1. However, at the end of year 2, there were some differences—namely, in the listener ratings of fluency and comprehensibility—that favored learners in the regular program. These findings highlight the beneficial effects of comprehension practice for the development of L2 pronunciation but also point to some potential limits of this practice.

Second language speech production: Investigating linguistic correlates of comprehensibility and accentedness for learners at different ability levels

The current project aimed to investigate the potentially different linguistic correlates of comprehensibility (i.e., ease of understanding) and accentedness (i.e., linguistic nativelikeness) in adult second language (L2) learners’ extemporaneous speech production. Timed picture descriptions from 120 beginner, intermediate, and advanced Japanese learners of English were analyzed using native speaker global judgments based on learners’ comprehensibility and accentedness, and then submitted to segmental, prosodic, temporal, lexical, and grammatical analyses. Results showed that comprehensibility was related to all linguistic domains, and accentedness was strongly tied with pronunciation (specifically segmentals) rather than lexical and grammatical domains. In particular, linguistic correlates of L2 comprehensibility and accentedness were found to vary by learners’ proficiency levels. In terms of comprehensibility, optimal rate of speech, appropriate and rich vocabulary use, and adequate and varied prosody were important for beginner to intermediate levels, whereas segmental accuracy, good prosody, and correct grammar featured strongly for intermediate to advanced levels. For accentedness, grammatical complexity was a feature of intermediate to high-level performance, whereas segmental and prosodic variables were essential to accentedness across all levels. These findings suggest that syllabi tailored to learners’ proficiency level (beginner, intermediate, or advanced) and learning goal (comprehensibility or nativelike accent) would be advantageous for the teaching of L2 speaking.

Language awareness and second language pronunciation: a classroom study

We examined the relationship between the quality of second language (L2) learners’ language awareness (as shown through dialogue journal entries) and the quality of their L2 pronunciation (as assessed through listener-based ratings of accentedness, comprehensibility, and fluency). The participants were 10 students enrolled in a 13-week university-level pronunciation course focusing on the suprasegmental aspects of English. We evaluated the students’ pronunciation during week 1 and week 11 of class and examined weekly dialogue journal entries written by the students over 10 weeks for evidence of language awareness. We analysed the comments for aspects of language awareness which were quantitative (language learning as assimilating a set of discrete items) and qualitative (language learning as a meaningful context in which learning occurs). We found a relationship between the students’ pronunciation ratings and the number of qualitative (not quantitative) language awareness comments, such that higher pronunciation ratings were associated with a greater number of qualitative language awareness comments. We also found that the students who produced the most qualitative language awareness comments were those who reported the largest amount of L2 listening done outside of class. We discuss the results in light of the role of language awareness in L2 pronunciation learning.

The Ethnic Group Affiliation and L2 Proficiency Link: Empirical Evidence

With economic globalisation making second language (L2) learning inevitable throughout the world, understanding what factors facilitate success is a socioeconomic necessity. This paper examined the role of social factors, those related to ethnic group affiliation (EGA), in the development of L2 proficiency. Although numerous studies have documented an intimate relationship between language and EGA, few have examined whether and how this relationship shapes L2 learning. The participants were 59 adult French–English bilinguals from Québec who read an English text and completed a questionnaire assessing their EGA, including pride, loyalty and support for their ethnic group and its language. Results revealed a significant, albeit complex, association between EGA and L2 proficiency. Basic feelings of pride and loyalty towards the ethnic group had no associations with L2 proficiency. Strong support for the groups sociopolitical aspirations were associated with low L2 proficiency. In turn, strong ethnic group identification, coupled with a positive orientation towards the L2 group, was associated with high L2 proficiency. These EGA effects were found to be mediated by amount of L2 use, revealing a plausible link sustaining the relationship between EGA and L2 learning success.

Phonological memory, attention control, and musical ability: Effects of individual differences on rater judgments of second language speech

This study examines how listener judgments of second language speech relate to individual differences in listeners’ phonological memory, attention control, and musical ability. Sixty native English listeners (30 music majors, 30 nonmusic majors) rated 40 nonnative speech samples for accentedness, comprehensibility, and fluency. The listeners were also assessed for phonological memory (serial recognition), attention control (trail making), and musical aptitude. Results showed that music majors assigned significantly lower scores than nonmusic majors solely for accentedness, particularly for low ability second language speakers. However, the ratings were not significantly affected by individual differences in listeners’ phonological memory and attention control, which implies that these factors do not bias listeners’ subjective judgments of speech. Implications for psycholinguistic research and for high-stakes speaking assessments are discussed.

Spoken-word processing in native and second languages: An investigation of auditory word priming

The present study investigated whether and to what extent auditory word priming, which is one mechanism of spoken-word processing and learning, is involved in a second language (L2). The objectives of the study were to determine whether L2 learners use auditory word priming as monolinguals do when they are acquiring an L2, how attentional processing orientation influences the extent to which they do so, and what L2 learners actually “learn” as they use auditory word priming. Results revealed that L2 learners use auditory word priming, that the extent to which they do so depends little on attention to the form of spoken input, and that L2 learners overrely on detailed context-specific information available in spoken input as they use auditory word priming.