L2 English Listeners Research Articles

L2 English listeners’ perceived comprehensibility and attitudes towards speech produced by L3 English learners from China

ABSTRACT This study investigated the perceptions of second language (L2) English learners from Hong Kong on the speech produced by third language (L3) English learners from the Greater Bay Area (GBA) of China. Twenty L2 learners from a local university were asked to listen to speech recordings from two L3 learners, and then complete an online survey, which focused on comprehension of the speech and four dimensions of language attitudes, namely Appropriateness, Solidarity, Status, and Dynamism. Results showed correlations between the phonological performance of learners and the perception of listeners. Specifically, vowel replacement and addition, as well as consonant addition were found to have a negative correlation with the learners’ actual comprehensibility. Replacing /ə/ with Chinese ‘er’ /ɚ/ only affected their perceived comprehensibility. For perceived attitude, the presence of vowel replacement and addition had an adverse effect on the rating of Dynamism. These two features, along with consonant addition, also negatively affected the rating of Status. Moreover, consonant addition was the sole factor that negatively affected the rating of Solidarity. These findings provided pedagogical insights for learners to communicate in English as well as social implications for language paradigm, particularly in a multilingual and multicultural context such as the GBA.

Variability in cross-language and cross-dialect perception. How Irish and Chinese migrants process Australian English vowels.

We investigate how three adult groups- experienced L2 English listeners; experienced D2 (second dialect) listeners; and native L1/D1 listeners- categorise Australian English (AusE) lax front vowels /ɪ e æ/ in /hVt/, /hVl/ and /mVl/ environments in a forced-choice categorisation task of synthesised continua. In study 1, AusE listeners show predictable categorisations, with an effect of coarticulation raising the vowel in perception for nasal onset stimuli, and a following lateral lowering the vowel in perception. In study 2, Irish (D2) and Chinese listeners (L2) have different categorisations than AusE listeners, likely guided by their D1/L1. Coarticulation influences the D1/D2 groups in similar ways, but results in more difficulty and less agreement for the Chinese. We also investigate the role of extralinguistic factors. For the Chinese listeners, higher proficiency in English does not correlate with more Australian-like categorisation behaviour. However, having fewer Chinese in their social network results in more Australian-like categorisation for some stimuli. These findings lend partial support to the role of experience and exposure in L2/D2 contexts, whereby categorisation is likely still driven by native categories, with increased exposure leading to better mapping, but not to a restructuring of underlying phonetic categories.

Insights into L2 connected speech segmentation: A gating experiment with listeners of different English proficiency levels

The relative contribution of bottom-up (i.e. acoustic-phonetic) and top-down (i.e. contextual) cues for successful L2 online segmentation is still a matter of debate. This study used the gating paradigm to investigate the segmentation processes of adult L2 English listeners with different proficiency levels, by looking at the type of cues they exploit and how they revise their hypotheses as connected speech is progressively revealed. Twenty-one French and Tunisian undergraduates were selected from a larger pool (n=226) and identified as skilled (n=11) and unskilled (n=10) listeners based on their scores on standardized English listening and vocabulary tests. Descriptive statistics, analysis of variance and qualitative analysis were performed on the obtained data. Overall, this study provides supporting L2 evidence for the hierarchical nature of the multiple speech segmentation cues (Mattys et al., 2005). The results indicated an early effect of context on segmentation that was independent of L2 proficiency when the context is constraining. In non-constraining contexts, successful segmentation is delayed for both groups with L2 unskilled listeners needing far more bottom-up information to process input and revise their segmentation hypotheses. We conclude that, in online L2 speech segmentation, what distinguishes proficient from non-proficient listeners is their efficient processing of bottom-up cues. Pedagogical implications are provided hoping to help L2 English teachers (and materials developers) focus on bottom-up training to improve their learners’ real-time comprehension competence.

The role of pragmatic markers in perceptions of L2 fluency in dialogue

This matched-guise study helps identify the features of interaction that contribute to perceptions of fluency in L2 dialogue. We focus on pragmatic markers (PM) that occur frequently in L1 interaction but relatively less so in L2 English learners' speech (Fung & Carter, 2007), namely, interpersonal (e.g., I see, okay) and cognitive PMs (e.g., I mean, well, I think). Despite evidence of their functional value in interaction (McCarthy, 2009), they are often considered markers of disfluency and rarely introduced in L2 classrooms. Speech samples of highly proficient L2 interaction were digitally manipulated to control for interpersonal and cognitive PMs simulating expert speaker-like PM use. L1 and L2 English listeners (N = 231) rated and commented upon interlocutor's fluency. The quantitative results suggest that listeners generally perceived speakers as more fluent when using PMs, although the magnitude of the effect was relatively small and driven by L1 raters. Raters' qualitative comments suggest covert influence of PM use on fluency perceptions and uncovered a bias favoring English L1 speaker PM use. Results support the potential value of explicitly addressing PMs in teaching L2 fluency and help researchers in understanding the construct of spoken fluency in dialogue to guide in its measurement and assessment.

Explaining L2 Lexical Learning in Multiple Scenarios: Cross-Situational Word Learning in L1 Mandarin L2 English Speakers.

Adults commonly struggle with perceiving and recognizing the sounds and words of a second language (L2), especially when the L2 sounds do not have a counterpart in the learner's first language (L1). We examined how L1 Mandarin L2 English speakers learned pseudo English words within a cross-situational word learning (CSWL) task previously presented to monolingual English and bilingual Mandarin-English speakers. CSWL is ambiguous because participants are not provided with direct mappings of words and object referents. Rather, learners discern word-object correspondences through tracking multiple co-occurrences across learning trials. The monolinguals and bilinguals tested in previous studies showed lower performance for pseudo words that formed vowel minimal pairs (e.g., /dit/-/dɪt/) than pseudo word which formed consonant minimal pairs (e.g., /bɔn/-/pɔn/) or non-minimal pairs which differed in all segments (e.g., /bɔn/-/dit/). In contrast, L1 Mandarin L2 English listeners struggled to learn all word pairs. We explain this seemingly contradicting finding by considering the multiplicity of acoustic cues in the stimuli presented to all participant groups. Stimuli were produced in infant-directed-speech (IDS) in order to compare performance by children and adults and because previous research had shown that IDS enhances L1 and L2 acquisition. We propose that the suprasegmental pitch variation in the vowels typical of IDS stimuli might be perceived as lexical tone distinctions for tonal language speakers who cannot fully inhibit their L1 activation, resulting in high lexical competition and diminished learning during an ambiguous word learning task. Our results are in line with the Second Language Linguistic Perception (L2LP) model which proposes that fine-grained acoustic information from multiple sources and the ability to switch between language modes affects non-native phonetic and lexical development.

Second Language Speech Intelligibility Revisited: Differential Roles of Phonological Accuracy, Visual Speech, and Iconic Gesture

AbstractAlthough intelligibility is a core concept in second language (L2) speech assessment and teaching research, the vast majority of previous work relies on audio‐only stimuli. The current study set out to examine how linguistic and visual information jointly interact to determine the degree of speech intelligibility. Both first language (L1) and L2 English listeners were presented with stimuli that varied along 3 factors (vowel error, visual speech, and iconic gesture) and completed an orthographic transcription task. Results revealed that iconic gesture significantly increased all the listeners’ intelligibility scores when speech contained vowel errors. When speech did not contain errors, gesture increased intelligibility for L2 listeners but not L1 listeners. Visual speech had no significant effect on intelligibility in either listener group. Vowel error reduced intelligibility by approximately 20–30% for both L1 and L2 listeners. Findings suggest that visual modalities, especially gestures, have the potential to significantly affect the intelligibility of speech containing phonological errors.

Vowel Quality and Direction of Stress Shift in a Predictive Model Explaining the Varying Impact of Misplaced Word Stress: Evidence From English

The use of suprasegmental cues to word stress occurs across many languages. Nevertheless, L1 English listeners' pay little attention to suprasegmental word stress cues and evidence shows that segmental cues are more important to L1 English listeners in how words are identified in speech. L1 English listeners assume strong syllables with full vowels mark the beginning of a new word, attempting alternative resegmentations only when this heuristic fails to identify a viable word string. English word stress errors have been shown to severely disrupt processing for both L1 and L2 listeners, but not all word stress errors are equally damaging. Vowel quality and direction of stress shift are thought to be predictors of the intelligibility of non-standard stress pronunciations—but most research so far on this topic has been limited to two-syllable words. The current study uses auditory lexical decision and delayed word identification tasks to test a hypothesized English Word Stress Error Gravity Hierarchy for words of two to five syllables. Results indicate that English word stress errors affect intelligibility most when they introduce concomitant vowel errors, an effect that is somewhat mediated by the direction of stress shift. As a consequence, the relative intelligibility impact of any particular lexical stress error can be predicted by the Hierarchy for both L1 and L2 English listeners. These findings have implications for L1 and L2 English pronunciation research and teaching. For research, our results demonstrate that varied findings about loss of intelligibility are connected to vowel quality changes of word stress errors and that these factors must be accounted for in intelligibility research. For teaching, the results indicate that not all word stress errors are equally important, and that only word stress errors that affect vowel quality should be prioritized.

Intelligibility and Comprehensibility of Korean English Speakers’ Phonological Features in Lingua Franca Listening Contexts

This study investigated L2 English listeners’ intelligibility and comprehensibility ratings of L2 English recordings of L1 Korean speakers’ speech. Specifically, it considered which segmentals and features resulting from Korean phonotactics cause a breakdown in Korean speakers’ L2 English intelligibility and comprehensibility for Mandarin L1-background L2 English speakers. As Korean speakers use English as a lingua franca primarily with their L1 Mandarin speaking neighbours, recordings of scripted and unscripted speech of Korean university students were sent to L1 Mandarin raters in mainland China and Taiwan, who rated utterances for intelligibility and comprehensibility. Findings showed that the most frequently mistranscribed features were epenthesis (inclusion of extra vowels to separate clustered consonants), substitution of nasals for plosives between vowels and sonorant consonants, and the consonant-vowel combination [wʊ]. Findings also suggest that less problematic features, such as [əʊ], /r/, and the distinction between [ʊ] and [u], are at times aided by similar realisations by L2 listeners.

Second language English listeners’ relative processing of coherence-based and frequency-based formulas: A corpus-based study

Abstract This study investigated L2 English listeners’ processing of formulas, in terms of the impact of two different factors inherent in these formulas. One was the formulas’ level of coherence and the other was the formulas’ level of frequency. High-coherence formulas are considered to have specialized meanings, while high-frequency formulas are considered to be less specialized in meaning, commonly being composed of relatively simple words that often co-occur in speech. In previous research, in an academic context, Ellis, Simpson-Vlach and Maynard (2008. Formulaic language in native and second-language speakers: Psycholinguistics, corpus linguistics, and TESOL. TESOL Quarterly 41. 375–396. doi:10.1002/j.1545-7249.2008.tb00137.x) had found that a high level of coherence was the main factor facilitating L1 users’ receptive processing of formulas, while a high level of frequency was the main factor facilitating advanced L2 users’ receptive processing of formulas. Ellis, Simpson-Vlach and Maynard (2008. Formulaic language in native and second-language speakers: Psycholinguistics, corpus linguistics, and TESOL. TESOL Quarterly 41. 375–396. doi:10.1002/j.1545-7249.2008.tb00137.x), from a usage-based perspective, attributed these differences mainly to the greater length of time the L1 users had spent in learning formulas. Consequently, the current study investigated whether these processing differences between the two user groups in an academic context (seen as a possible developmental trend) would be apparent between proficient and less-proficient L2 listeners in a relatively less-challenging, general English environment. The study was considered important for possibly signaling the types of aural receptive formulas to foreground by L2 general English instructors and materials designers. The research examined two groups of L2 learners, one advanced and the other intermediate level, while they listened to four texts. A paused transcription technique elicited the listeners’ identification of targeted segments from the texts, many of which were classified through corpus analysis as containing more/less-coherent formulas or more/less-frequent formulas. Examination of how these formula types were processed by both proficiency groups, however, did not find major differences between the groups in their processing of the different formula types, and thus little evidence of a possible formula developmental trend.

Is there an interlanguage intelligibility benefit in perception of English word stress?

This paper asks whether there is an ‘interlanguage intelligibility benefit’ in perception of word-stress, as has been reported for global sentence recognition. L1 English listeners, and L2 English listeners who are L1 speakers of Arabic dialects from Jordan and Egypt, performed a binary forced-choice identification task on English near-minimal pairs (such as[ˈɒbdʒɛkt] ~ [əbˈdʒɛkt]) produced by an L1 English speaker, and two L2 English speakers from Jordan and Egypt respectively. The results show an overall advantage for L1 English listeners, which replicates the findings of an earlier study for general sentence recognition, and which is also consistent with earlier findings that L1 listeners rely more on structural knowledge than on acoustic cues in stress perception. Non-target-like L2 productions of words with final stress (which are primarily cued in L1 production by vowel reduction in the initial unstressed syllable) were less accurately recognized by L1 English listeners than by L2 listeners, but there was no evidence of a generalized advantage for L2 listeners in response to other L2 stimuli.

Experience with a second language affects the use of fundamental frequency in speech segmentation.

This study investigates whether listeners’ experience with a second language learned later in life affects their use of fundamental frequency (F0) as a cue to word boundaries in the segmentation of an artificial language (AL), particularly when the cues to word boundaries conflict between the first language (L1) and second language (L2). F0 signals phrase-final (and thus word-final) boundaries in French but word-initial boundaries in English. Participants were functionally monolingual French listeners, functionally monolingual English listeners, bilingual L1-English L2-French listeners, and bilingual L1-French L2-English listeners. They completed the AL-segmentation task with F0 signaling word-final boundaries or without prosodic cues to word boundaries (monolingual groups only). After listening to the AL, participants completed a forced-choice word-identification task in which the foils were either non-words or part-words. The results show that the monolingual French listeners, but not the monolingual English listeners, performed better in the presence of F0 cues than in the absence of such cues. Moreover, bilingual status modulated listeners’ use of F0 cues to word-final boundaries, with bilingual French listeners performing less accurately than monolingual French listeners on both word types but with bilingual English listeners performing more accurately than monolingual English listeners on non-words. These findings not only confirm that speech segmentation is modulated by the L1, but also newly demonstrate that listeners’ experience with the L2 (French or English) affects their use of F0 cues in speech segmentation. This suggests that listeners’ use of prosodic cues to word boundaries is adaptive and non-selective, and can change as a function of language experience.

The segregation of target speech from competing speech when listening in a second language

Introducing a perceived spatial separation (via the precedence effect) between target speech and competing speech reduces the signal-to-noise ratio (SNR) required for the recognition of key target words by 3–7 dB in syntactically correct but semantically anomalous target sentences such a “A rose could paint a fish” (target words: rose, paint, fish). A recent study of monolingual Mandarin participants listening to anomalous sentences in Mandarin Chinese suggests that perceived spatial separation releases listeners from informational masking (IM) by facilitating access to the lexicon at the morphemic level, presumably by enhancing the segregation of the target speech from the competing speech background. This raises the interesting question as to whether perceived spatial separation facilitates lexical access in the same way for people listening in the second language (L2) as it does when listening in their first language (L1) since access to the L2 lexicon is likely to be less robust than access to the L1 lexicon. A second interesting question is the extent to which operating in a L2 environment affects release from IM when the competing speech is in L1. These issues will be addressed in L2 English listeners whose L1 is either Chinese or Korean.

Analysis of categorical response data: Use logistic regression rather than endpoint-difference scores or discriminant analysis

Example of a typical second-language (L2) speech perception experiment: Synthetic vowel stimuli from a two-dimensional grid of points in which acoustic properties vary systematically in duration and spectral properties are classified as English /i/ or /I/ by L2-English listeners. In a number of studies, the data from such experiments have been analyzed using endpoint-difference scores or discriminant analysis. The current letter describes theoretical problems inherent in the first procedure in general, and in the application of the second procedure to data of this type in particular. Logistic regression is proposed as an alternative, which does not suffer from these problems.

Informational masking in first‐ and second‐language speech recognition.

Human speech recognition in noisy conditions is modulated by cognitive factors such as language background. For example, noise is more detrimental to non‐native listeners than native listeners (e.g., van Wijngaarden et al., 2002), and when noise is a speech signal, native‐language noise is more detrimental than foreign‐language noise for listeners attending to native‐language speech targets (e.g., Van Engen and Bradlow, 2007). It is not clear, however, whether this increased interference is primarily due to the native status of the noise or to the greater similarity between target and noise. To address this issue, English speech recognition in the presence of English and Mandarin babble was assessed for monolingual English listeners and L2 English listeners whose L1 is Mandarin. Results showed that intelligibility for both groups was lower in English versus Mandarin babble; that is, L2 listeners experienced more difficulty in same‐language noise versus native‐language noise. However, monolingual English listeners showed a greater release from masking in Mandarin noise than did L1 Mandarin listeners. The informational masking imposed on speech targets by interfering speech noise, therefore, is dependent both on the linguistic and/or acoustic similarity between the noise and the target and on the listeners’ experience with the languages involved.

L1-Spanish Speakers' Acquisition of the English /i /—/I/ Contrast: Duration-based Perception is Not the Initial Developmental Stage

L1-Spanish L2-English listeners' perception of a Canadian-English /bIt//bId/-/bit/-/bid/ continuum was investigated. Results were largely consistent with the developmental stages for L1-Spanish listeners' acquisition of English /i/ and /I/ hypothesized by Escudero (2000): Stage 0, inability to distinguish. Stage 1, duration based. Stage 2, duration and spectral based. Stage 3, L1-English-like primarily spectral based. However, on the basis of the results an additional stage was hypothesized: Stage 1/2, multidimensional-category-goodness-difference assimilation to Spanish /i/, with English vowel tokens perceived as good examples of Spanish /i/ labeled as English /I/ and poor examples labeled as English /i/. It is hypothesized that L1-Spanish listeners' preference for duration cues is not an initial strategy for distinguishing English /i/ and /I/. Rather, it is a secondary developmental stage which emerges from an earlier stage when both spectral and duration cues are used.