Adult Native Speakers Of English Research Articles

The role of awareness in implicit and explicit knowledge

Abstract This study investigates the initial incidental acquisition of two L2 morphosyntactic rules and their immediate usage in production. Using a miniature artificial language paradigm, multiple exposure sessions, realistic exposure, non-salient linguistic features, as well as multiple outcome measures, we demonstrate that adult learners can learn animacy with low levels of awareness, but not case. Forty adult native speakers of English participated in the experiment. Participants were exposed to audio sentences in the artificial language paired with pictures on the computer screen for three sessions. Knowledge of animacy and case was measured with production and grammaticality judgment tests. Results demonstrated that concrete, contiguous and easily trackable L2 properties that lend themselves to distributional learning, such as animacy marking, can benefit from incidental exposure. However, more abstract L2 properties, like the morphological paradigm of case, seem not to be learnable by incidental means, and opportunities for explicit learning must be provided.

White matter associations with spelling performance.

Multiple neurocognitive processes are involved in the highly complex task of producing written words. Yet, little is known about the neural pathways that support spelling in healthy adults. We assessed the associations between performance on a difficult spelling-to-dictation task and microstructural properties of language-related white matter pathways, in a sample of 73 native English-speaking neurotypical adults. Participants completed a diffusion magnetic resonance imaging scan and a cognitive assessment battery. Using constrained spherical deconvolution modeling and probabilistic tractography, we reconstructed dorsal and ventral white matter tracts of interest, bilaterally, in individual participants. Spelling associations were found in both dorsal and ventral stream pathways. In high-performing spellers, spelling scores significantly correlated with fractional anisotropy (FA) within the left inferior longitudinal fasciculus, a ventral stream pathway. In low-performing spellers, spelling scores significantly correlated with FA within the third branch of the right superior longitudinal fasciculus, a dorsal pathway. An automated analysis of spelling errors revealed that high- and low- performing spellers also differed in their error patterns, diverging primarily in terms of the orthographic distance between their errors and the correct spelling, compared to the phonological plausibility of their spelling responses. The results demonstrate the complexity of the neurocognitive architecture of spelling. The distinct white matter associations and error patterns detected in low- and high- performing spellers suggest that they rely on different cognitive processes, such that high-performing spellers rely more on lexical-orthographic representations, while low-performing spellers rely more on phoneme-to-grapheme conversion.

Lexical knowledge, memory and experience

Abstract Knowing a language involves knowing a large number of idiosyncratic units such as individual words and collocations which must be learned from the input. This study explores the role of implicit and explicit memory, as well as language experience, and specifically print exposure, with regard to adult native English speakers’ knowledge of vocabulary and collocations. Consistent with prior research, our findings reveal a strong correlation between print exposure and performance on both language tasks. However, contrary to predictions, there were no significant effects of either implicit or explicit memory on either task. We argue that this is most likely due to the fact that language learning relies primarily on memory for associations between form and meaning and between words rather than memory sequences of meaningless phonological forms.

Identification and Analysis Of The Existence of Word Stress Variation Between The Pronunciation Of Certain English Words Of Native English Speakers and Native Telugu Speakers

Since the decline of the COVID-19 pandemic, immigration as a whole has been on the rise especially to the United States. The newly released census report for the years 2021-22 has reported an increase of over 1 million legal immigrants to the U.S. substantially comprised of Telugu speaking individuals. This research uses 8 native Telugu speaking adults and 8 native English-speaking adults to identify, analyze, and understand the existence of word stress variation between the pronunciation of the English language between the two groups. The results indicate that there indeed exists a significant difference in the position of word stress in the Telugu speakers’ pronunciations with word stress predominantly applied to the last or second-to-last/penultimate syllable. The main cause for this shift in position was due to L1 interference from the mother tongue. These results have a plethora of implications for future research on sentences with and without punctuation marks, other major English stress rules, and different parts of speech that are commonly used in everyday language.

Sensory processing of native and non-native phonotactic patterns in the alpha and beta frequency bands

The phonotactic patterns of one's native language are established within cortical network processing during development. Sensory processing of native language phonotactic patterns established in memory may be modulated by top-down signals within the alpha and beta frequency bands. To explore sensory processing of phonotactic patterns in the alpha and beta frequency bands, electroencephalograms (EEGs) were recorded from native Polish and native English-speaking adults as they listened to spoken nonwords within same and different nonword pairs. The nonwords contained three phonological sequence onsets that occur in the Polish and English languages (/pət/, /st/, /sət/) and one onset sequence /pt/, which occurs in Polish but not in English onsets. Source localization modeling was used to transform 64-channel EEGs into brain source-level channels. Spectral power values in the low frequencies (2–29 Hz) were analyzed in response to the first nonword in nonword pairs within the context of counterbalanced listening-task conditions, which were presented on separate testing days. For the with-task listening condition, participants performed a behavioral task to the second nonword in the pairs. For the without-task condition participants were only instructed to listen to the stimuli. Thus, in the with-task condition, the first nonword served as a cue for the second nonword, the target stimulus. The results revealed decreased spectral power in the beta frequency band for the with-task condition compared to the without-task condition in response to native language phonotactic patterns. In contrast, the task-related suppression effects in response to the non-native phonotactic pattern /pt/ for the English listeners extended into the alpha frequency band. These effects were localized to source channels in left auditory cortex, the left anterior temporal cortex and the occipital pole. This exploratory study revealed a pattern of results that, if replicated, suggests that native language speech perception is supported by modulations in the alpha and beta frequency bands.

The Impact of Grammar on the Construal of Discourse Alternatives in German and English

This paper investigates additive links to discourse alternatives in picture comparison dialogues produced by adult native speakers of English and German. Additive relations are established across turns when participants are confirming the presence of matching objects on both pictures (A: “I have X”. B: “I also have X”). Speakers thereby describe their own picture and construe the interlocutor (or rather: the interlocutor’s picture) as a discourse alternative. Whereas the vast majority of the confirming descriptions in German contain an additive particle (auch), less than half of the corresponding confirmations in the English data do (“also”, “too”, etc.). Numbers differ even more drastically in polarity questions (“Do you (also) have X?”) that are equally typical for the dialogue task. Such frequency differences are at odds with recent accounts treating additive particles as being quasi obligatory when their presupposition is satisfied. An in-depth contrastive analysis of lexical, syntactic and information structural properties reveals that the default mapping of information units on syntactic functions (subject) in conjunction with the SVO word order of English leads to a structure in which subject, initial (topic) position and the particle’s associated constituent coincide. This would make the relation to its discourse alternative more prominent than warranted by the dialogue task and speakers of English leave this relation unmarked or resort to alternative constructions instead. The V2 syntax of German, on the other hand, allows for a dissociation of discourse topic and associated constituent. It allows the speaker to topicalize reference to the matching object, to highlight the confirmation of its presence on the speaker’s picture, and to relate the changing information to its discourse alternative in a non-contrastive way.

Automatic morpheme identification across development: Magnetoencephalography (MEG) evidence from fast periodic visual stimulation.

The present study combined magnetoencephalography (MEG) recordings with fast periodic visual stimulation (FPVS) to investigate automatic neural responses to morphemes in developing and skilled readers. Native English-speaking children (N = 17, grade 5–6) and adults (N = 28) were presented with rapid streams of base stimuli (6 Hz) interleaved periodically with oddballs (i.e., every fifth item, oddball stimulation frequency: 1.2 Hz). In a manipulation-check condition, tapping into word recognition, oddballs featured familiar words (e.g., roll) embedded in a stream of consonant strings (e.g., ktlq). In the experimental conditions, the contrast between oddball and base stimuli was manipulated in order to probe selective stem and suffix identification in morphologically structured pseudowords (e.g., stem + suffix pseudowords such as softity embedded in nonstem + suffix pseudowords such as trumess). Neural responses at the oddball frequency and harmonics were analyzed at the sensor level using non-parametric cluster-based permutation tests. As expected, results in the manipulation-check condition revealed a word-selective response reflected by a predominantly left-lateralized cluster that emerged over temporal, parietal, and occipital sensors in both children and adults. However, across the experimental conditions, results yielded a differential pattern of oddball responses in developing and skilled readers. Children displayed a significant response that emerged in a mostly central occipital cluster for the condition tracking stem identification in the presence of suffixes (e.g., softity vs. trumess). In contrast, adult participants showed a significant response that emerged in a cluster located in central and left occipital sensors for the condition tracking suffix identification in the presence of stems (e.g., softity vs. stopust). The present results suggest that while the morpheme identification system in Grade 5–6 children is not yet adult-like, it is sufficiently mature to automatically analyze the morphemic structure of novel letter strings. These findings are discussed in the context of theoretical accounts of morphological processing across reading development.

The acquisition of L2 allophonic variants: The role of phonological distribution and lexical cues

Adult learners acquire second language (L2) allophones with experience. We examine two mechanisms which may support the acquisition of allophonic variants in second language acquisition. One of the mechanisms is based on the distribution of phones with respect to their phonological context (i.e. phonological distribution). The other is based on the role the phones play in contrasting words (i.e. lexical contrast). Experiment 1 established adult native English speakers’ baseline sensitivity to the novel [b]–[β] auditory contrast. In Experiment 2 we examined whether adult native English speakers infer the phonological status of [b] and [β] in an artificial language based only on their distributions to phonological contexts. We observed no evidence that these participants were able to do so. In Experiment 3 we investigated whether learners infer the phonological status of [b] and [β] from the role they play in lexical contrast and observed both perceptual and lexical processing evidence to suggest that adults may use meaning-based cues to the lack of contrast to learn that two phones are allophones of the same phoneme. Together our findings suggest that adult L2 learners may prioritize information about function (in this case, lexical contrast) over the phonological distribution of phones as they determine the phonological status of L2 sounds.

Effect of cumulative distance in motor space on segment-sized slips in 3-word phrases

Slips, or speech errors (e.g., “teep a cape” for “keep a tape”), have been described as the disordered arrangement of discrete elements, giving rise to the hypothesis that these arise from misordering during phonological encoding. An alternative hypothesis is that slips are articulatory timing errors, conditioned by the same motor factors that underlie coarticulation. This hypothesis motivates the present study, which used a modified slip procedure to elicit errors from 40 native English-speaking adults. Participants spoke 3-word phrases that were constructed as mini tongue twisters, with alternating word onsets and repeating rhymes. These phrases were designed to condition slips to a greater or less extent according to coarticulatory-adjacent processes (e.g., palatalization). A metric of cumulative distance-traveled in motor space during phrase production was also calculated: the degree of change in vocal tract shapes across the phrase, estimated using data generated within the tubesounds model in ArtiSynth. Phrases designed to more strongly condition slips were expected to cover less cumulative distance in motor space than phrases designed to less strongly condition slips. The distance-traveled metric did not always align with this expectation, but was nonetheless a better predictor of presence/absence of slips than phrase condition in analyses on preliminary data.

Distinct neural sources underlying visual word form processing as revealed by steady state visual evoked potentials (SSVEP)

EEG has been central to investigations of the time course of various neural functions underpinning visual word recognition. Recently the steady-state visual evoked potential (SSVEP) paradigm has been increasingly adopted for word recognition studies due to its high signal-to-noise ratio. Such studies, however, have been typically framed around a single source in the left ventral occipitotemporal cortex (vOT). Here, we combine SSVEP recorded from 16 adult native English speakers with a data-driven spatial filtering approach—Reliable Components Analysis (RCA)—to elucidate distinct functional sources with overlapping yet separable time courses and topographies that emerge when contrasting words with pseudofont visual controls. The first component topography was maximal over left vOT regions with a shorter latency (approximately 180 ms). A second component was maximal over more dorsal parietal regions with a longer latency (approximately 260 ms). Both components consistently emerged across a range of parameter manipulations including changes in the spatial overlap between successive stimuli, and changes in both base and deviation frequency. We then contrasted word-in-nonword and word-in-pseudoword to test the hierarchical processing mechanisms underlying visual word recognition. Results suggest that these hierarchical contrasts fail to evoke a unitary component that might be reasonably associated with lexical access.

Look at that: Spatial deixis reveals experience-related differences in prediction

ABSTRACT Prediction-based theories posit that interlocutors use prediction to process language efficiently and to coordinate dialogue. The present study evaluated whether listeners can use spatial deixis (i.e., this, that, these, and those) to predict the plurality and proximity of a speaker’s upcoming referent. In two eye-tracking experiments with varying referential complexity (N = 168), native English-speaking adults, native English-learning 5-year-olds, and nonnative English-learning adults viewed images while listening to sentences with or without informative deictic determiners, e.g., Look at the/this/that/these/those wonderful cookie(s). Results showed that all groups successfully exploited plurality information. However, they varied in using deixis to anticipate the proximity of the referent; specifically, L1 adults showed more robust prediction than L2 adults, and L1 children did not show evidence of prediction. By evaluating listeners with varied language experiences, this investigation helps refine proposed mechanisms of prediction and suggests that linguistic experience is key to the development of such mechanisms.

Short Vowels and Context Effects: The Case of English Speakers Reading Arabic

The present study examines the impact of both short vowels and context on adult native English speakers’ reading accuracy of Arabic orthography. To this end, two groups of adult Arabic learners with different proficiency levels were recruited: 30 second-year, and 30 third-year learners. Subjects were instructed to read 50 isolated words, 20 sentences and 10 paragraphs in two different reading conditions: vocalized and unvocalized. Findings demonstrated a significant positive influence of both short vowels and context on second-year learners’ word recognition of the target stimuli. That is, second year Arabic learners had better accuracy when reading vocalized texts compared to unvocalized ones and were significantly more accurate at reading paragraphs and sentences than isolated words. However, third-year students’ reading accuracy was only significantly affected by the reading context.

Diagnostic Accuracy of the AzBio Speech Recognition in Noise Test.

Purpose The goal of this study was to determine the ability of the AzBio speech recognition in noise (SRN) test to distinguish between groups of participants with and without a self-reported SRN disorder and a self-reported signal-to-noise ratio (SNR) loss. Method Fifty-four native English-speaking young adults with normal pure-tone thresholds (≤ 25 dB HL, 0.25-6.0 kHz) participated. Individuals who reported hearing difficulty in a noisy restaurant (Reference Standard 1) were placed in the SRN disorder group. SNR loss groups were created based on the self-report of the ability to hear Hearing in Noise Test (HINT) sentences in steady-state speech-shaped noise, four-talker babble, and 20-talker babble in a controlled listening environment (Reference Standard 2). Participants with HINT thresholds poorer than or equal to the median were assigned to the SNR loss group. Results The area under the curve from the receiver operating characteristics curves revealed that the AzBio test was not a significant predictor of an SRN disorder, or an SNR loss using the steady-state noise Reference Standard 2 condition. However, the AzBio was a significant predictor of an SNR loss using the four-talker babble and 20-talker babble Reference Standard 2 conditions (p < .05). The AzBio was a significant predictor of an SNR loss when using the average HINT thresholds across the three Reference Standard 2 masker conditions (area under the curve = .79, p = .001). Conclusions The AzBio test was not a significant predictor of a self-reported SRN disorder or a self-reported SNR loss in steady-state noise. However, it was a significant predictor of a self-reported SNR loss in babble noise and the average across all noise conditions. A battery of reference standard tests with a range of maskers in a controlled listening environment is recommended for diagnostic accuracy evaluations of SRN tests.

Declarative Memory Predicts Phonological Processing Abilities in Adulthood.

Individual differences in phonological processing abilities have often been attributed to perceptual factors, rather than to factors relating to learning and memory. Here, we consider the contribution of individual differences in declarative and procedural memory to phonological processing performance in adulthood. We examined the phonological processing, declarative memory, and procedural memory abilities of 79 native English-speaking young adults with typical language and reading abilities. Declarative memory was assessed with a recognition memory task of real and made-up objects. Procedural memory was assessed with a serial reaction time task. For both tasks, learning was assessed shortly after encoding, and again after a 12-h, overnight delay. We regressed phonological processing ability with memory performance on both days. We found that declarative memory, but not procedural memory, was highly predictive of phonological processing abilities. Specifically, declarative memory scores obtained shortly after learning were associated with non-word repetition performance, whereas declarative memory scores obtained after the overnight delay were associated with phonological awareness. Procedural memory was not associated with either of the phonological processing measures. We discuss these findings in the context of adult participants with mature phonological systems. We examine possible implications for the relationship between declarative memory and phonological processing in adulthood.

Performance Differences Between Native and Non-Native Speakers on a New Happy-Sad Executive Function Measure.

The happy-sad task adapts the classic day-night task by incorporating two early acquired emotional concepts ("happy" and "sad") and demonstrates elevated inhibitory demands for native speakers. The task holds promise as a new executive function measure for assessing inhibitory control across the lifespan, but no studies have examined the influence of language of test administration on performance. Seventy adult native English speakers and 50 non-native speakers completed the computerized day-night and the new happy-sad tasks administered in English. In two conditions, participants were categorized pictorial stimuli either in a congruent manner ("happy" for a happy face) or in a more challenging, incongruent manner ("sad" for a happy face). Lexical decision performance was obtained to estimate levels of English language proficiency. Native speakers and non-native speakers performed comparably except for the critical incongruent condition of the happy-sad task, where native speakers responded more slowly. A greater congruency effect for the happy-sad task was found for native than for non-native speakers. Lexical decision performance was associated with performance on the challenging incongruent conditions. This study reinforced the usefulness of the happy-sad task as a new measure in evaluating inhibitory control in adult native-speakers. However, the language of test administration needs to be considered in assessment because it may lead to performance differences between native and non-native speakers.

Semantic Relationships Between Representational Gestures and Their Lexical Affiliates Are Evaluated Similarly for Speech and Text.

This research examined whether the semantic relationships between representational gestures and their lexical affiliates are evaluated similarly when lexical affiliates are conveyed via speech and text. In two studies, adult native English speakers rated the similarity of the meanings of representational gesture-word pairs presented via speech and text. Gesture-word pairs in each modality consisted of gestures and words matching in meaning (semantically-congruent pairs) as well as gestures and words mismatching in meaning (semantically-incongruent pairs). The results revealed that ratings differed by semantic congruency but not language modality. These findings provide the first evidence that semantic relationships between representational gestures and their lexical affiliates are evaluated similarly regardless of language modality. Moreover, this research provides an open normed database of semantically-congruent and semantically-incongruent gesture-word pairs in both text and speech that will be useful for future research investigating gesture-language integration.

The contributions of proficiency, exposure, and working memory capacity to second language learners’ comprehension of indirect speech

Abstract Pragmatic inferencing necessary to interpret indirect speech can be problematic for second language (L2) learners and could be influenced by factors such as L2 proficiency and L2 exposure as well as the difficulty of inference to be made (e.g., conventional vs. nonconventional inference) – particularly difficult inferences could tax working memory capacity. The comprehension of direct speech (acceptances and refusals), conventional indirect speech (acceptances and refusals – some with introductory phrases), and nonconventional indirect speech (opinions) was measured in adult Spanish-English bilinguals (n = 58) and native English speakers (n = 38). L2 speakers generally performed worse than native speakers and were influenced by inference difficulty. They more accurately and quickly comprehended direct speech than nonconventional indirect speech, and most conventional indirect speech items fell between these extremes. L2 proficiency was found to be a strong predictor of both conventional and nonconventional inferencing, with L2 exposure also having some impact. Importantly, L1 working memory capacity was shown to independently contribute to L2 learners’ accuracy on one type of conventional and one type of nonconventional inference. Thus, some pragmatic inferencing may require both enough skill to process the second language and enough working memory capacity to make the inference.

Training a non-native vowel contrast with a distributional learning paradigm results in improved perception and production

Previous distributional learning research suggests that adults can improve perception of a non-native contrast more efficiently when exposed to a bimodal than a unimodal distribution. Studies have also suggested that perceptual learning can transfer to production. The current study tested whether the addition of visual images to reinforce the contrast and active learning with feedback would result in learning in both conditions and would transfer to gains in production. Native English-speaking adults heard stimuli from a bimodal or unimodal /o/-/œ/ continuum. No group differences were found on a discrimination task, possibly suggesting that the supports eliminated previously documented group differences. On an identification task, listeners in the bimodal group showed better performance than the unimodal group on the endpoint stimuli. Production results indicated that both groups showed increased Euclidean distance between the target vowels after training, suggesting that perceptual training improved production skills in both conditions. Contrary to expectations, degree of perception and production learning were not correlated. Together, these results suggest that a bimodal distribution may aid learning, but that adding images to reinforce the contrast and active learning to the training paradigm could mitigate disadvantages found previously for participants exposed to a unimodal distribution.

The intelligibility of English verbs in the simple past tense

This study investigated the intelligibility of English verbs in the simple past inserted in sentences. The verbs were produced by two adult native speakers of English and six adult nonnative speakers, and they were transcribedby 13 adult Brazilian listeners. Results indicated that the intelligibility rate of regular verbs was similar to the irregular ones, and that the intelligibility of verbs produced by BP talkers was similar to the Spanish talkers. The intelligibility rate of German talkers, on the other hand, was lower than the intelligibility of BP and Spanish talkers but higher than the intelligibility of verbs produced by native speakers.

THE ROLE OF INPUT VARIABILITY AND LEARNER AGE IN SECOND LANGUAGE VOCABULARY LEARNING

AbstractInput variability is key in many aspects of linguistic learning, yet variability increases input complexity, which may cause difficulty in some learning contexts. The current work investigates this trade-off by comparing speaker variability effects on L2 vocabulary learning in different age groups. Existing literature suggests that speaker variability benefits L2 vocabulary learning in adults, but this may not be the case for younger learners. In this study native English-speaking adults, 7- to 8-year-olds, and 10- to 11-year-olds learned six novel Lithuanian words from a single speaker, and six from eight speakers. In line with previous research, adults showed better production of the multispeaker items at test. No such benefit was found for either group of children, either in production or comprehension. Children also had greater difficulties in processing multiple-speaker cues during training. We conclude that age-related capacity limitations may constrain the ability to utilize speaker variability when learning words in a new language.