Neural deficits in auditory phonological processing in Chinese children with English reading impairment

2015 ◽  
Vol 19 (2) ◽  
pp. 331-346 ◽  
Author(s):  
XIANGZHI MENG ◽  
HANLIN YOU ◽  
MEIXIA SONG ◽  
AMY S. DESROCHES ◽  
ZHENGKE WANG ◽  
...  
Keyword(s):  
Second Language ◽  
Phonological Processing ◽  
Inferior Frontal Gyrus ◽  
Superior Temporal Gyrus ◽  
Neural Mechanism ◽  
Reading Impairment ◽  
English Reading ◽  
L2 Learners ◽  
L1 And L2 ◽  
Esl Learners

Auditory phonological processing skills are critical for successful reading development in English not only in native (L1) speakers but also in second language (L2) learners. However, the neural deficits of auditory phonological processing remain unknown in English-as-the-second-language (ESL) learners with reading difficulties. Here we investigated neural responses during spoken word rhyme judgments in typical and impaired ESL readers in China. The impaired readers showed comparable activation in the left superior temporal gyrus (LSTG), but reduced activation in the left inferior frontal gyrus (LIFG) and left fusiform and reduced connectivity between the LSTG and left fusiform when compared to typical readers. These findings suggest that impaired ESL readers have relative intact representations but impaired manipulation of phonology and reduced or absent automatic access to orthographic representations. This is consistent with previous findings in native English speakers and suggests a common neural mechanism underlying English impairment across the L1 and L2 learners.

Motor theory modulated by task load: strategies of phonological processing in frontal aphasia revealed by tDCS over the LIFG

2019 ◽  
Author(s):  
Lílian Rodrigues de Almeida ◽  
Paul A. Pope ◽  
Peter Hansen
Keyword(s):  
Speech Perception ◽  
Speech Production ◽  
Phonological Processing ◽  
Inferior Frontal Gyrus ◽  
Dorsal Stream ◽  
Superior Temporal Gyrus ◽  
Motor Theory ◽  
Task Load ◽  
Cathodal Tdcs ◽  
The Individual

In our previous studies we supported the claim that the motor theory is modulated by task load. Motoric participation in phonological processing increases from speech perception to speech production, with the endpoints of the dorsal stream having changing and complementary weightings for processing: the left inferior frontal gyrus (LIFG) being increasingly relevant and the left superior temporal gyrus (LSTG) being decreasingly relevant. Our previous results for neurostimulation of the LIFG support this model. In this study we investigated whether our claim that the motor theory is modulated by task load holds in (frontal) aphasia. Person(s) with aphasia (PWA) after stroke typically have damage on brain areas responsible for phonological processing. They may present variable patterns of recovery and, consequently, variable strategies of phonological processing. Here these strategies were investigated in two PWA with simultaneous fMRI and tDCS of the LIFG during speech perception and speech production tasks. Anodal tDCS excitation and cathodal tDCS inhibition should increase with the relevance of the target for the task. Cathodal tDCS over a target of low relevance could also induce compensation by the remaining nodes. Responses of PWA to tDCS would further depend on their pattern of recovery. Responses would depend on the responsiveness of the perilesional area, and could be weaker than in controls due to an overall hypoactivation of the cortex. Results suggest that the analysis of motor codes for articulation during phonological processing remains in frontal aphasia and that tDCS is a promising diagnostic tool to investigate the individual processing strategies.

scholarly journals PHONOLOGICAL PROCESSING OF STRESS BY NATIVE ENGLISH SPEAKERS LEARNING SPANISH AS A SECOND LANGUAGE

2021 ◽  
pp. 1-23
Author(s):  
Ramsés Ortín ◽  
Miquel Simonet
Keyword(s):  
Second Language ◽  
Phonological Processing ◽  
First Language ◽  
Native English Speakers ◽  
Recall Task ◽  
English Speakers ◽  
Auditory Stimuli ◽  
L2 Learners ◽  
L1 English ◽  
Processing Stress

Abstract One feature of Spanish that presents some difficulties to second language (L2) learners whose first language (L1) is English concerns lexical stress. This study explores one aspect of the obstacle these learners face, weak phonological processing routines concerning stress inherited from their native language. Participants were L1 English L2 learners of Spanish. The experiment was a sequence-recall task with auditory stimuli minimally contrasting in stress (target) or segmental composition (baseline). The results suggest that learners are more likely to accurately recall sequences with stimuli contrasting in segmental composition than stress, suggesting reduced phonological processing of stress relative to a processing baseline. Furthermore, an increase in proficiency—assessed by means of grammatical and lexical tests—was found to be modestly associated with an increase in the accuracy of processing stress. We conclude that the processing routines of native English speakers lead to an acquisitional obstacle when learning Spanish as a L2.

scholarly journals Arabic Learners’ Production of Regular English Past Tense Verbs

2021 ◽  
Vol 13 (6) ◽  
pp. 76
Author(s):  
Baraa A. Rajab
Keyword(s):  
Second Language ◽  
Past Tense ◽  
Inflectional Morphology ◽  
Native Languages ◽  
L1 Transfer ◽  
Obligatory Contour Principle ◽  
Arabic Speakers ◽  
L2 Learners ◽  
Esl Learners ◽  
Abstract Feature

Previous studies show that second language (L2) learners of English sometimes produce the verb with proper past tense inflectional morphology as in help[t] and sometimes repair the cluster, as in helpø or hel[pəd]. Complicating matters, these studies focused on L2 learners whose native languages disallowed codas or had very restricted codas. Thus, it is difficult to tell whether any problems in producing past tense morphology are due to first language L1-transferred coda restrictions, or an inability to acquire the abstract feature of past tense. To rule out native language syllable structure interference, this paper aims to examine the production of the English regular past tense verb by Arabic L1 ESL learners, a language that allows complex codas. The paper also examines the role of a phonological universal, the Obligatory Contour Principle (OCP) that disallows two adjacent similar sounds, and its effect on learners’ production. The data come from twenty-two English as a Second Language (ESL) students at three levels of proficiency. The task was a sentence list eliciting target clusters in past tense contexts that violate manner in OCP: fricative + stop ([st], [ft]) vs. stop + stop ([pt], [kt]). Results show that L1 Arabic speakers have difficulty in producing past tense morphology, even though their L1 allows complex codas. Fricative + stop clusters are repaired (epenthesis/deletion) at a lower rate (low =25.71%, intermediate = 6.6%, high=11.11%) than stop + stop clusters (low=57.14%, intermediate = 40.27%, high=22.91%). The higher rate of repair is clear in stops + stop clusters suggesting that learners abide by phonological universals and prefer not to violate OCP. Finally, proficiency level has an effect on target-like production, as higher-proficiency learners produce past-tense morphology at a higher rate than lower-proficiency learners. Together, these results indicate that L1 transfer is not the only source of difficulty in the production of past tense morphology, and that the abstract feature of tense is problematic, particularly at the early stages of ESL development.

Orthographic activation in spoken word recognition of L2 phonological variants

2020 ◽  
pp. 026765832096825
Author(s):  
Jeong-Im Han ◽  
Song Yi Kim
Keyword(s):  
Second Language ◽  
Word Recognition ◽  
Spoken Word Recognition ◽  
First Language ◽  
Spoken Word ◽  
Advanced Level ◽  
Spoken Words ◽  
L2 Learners ◽  
L1 And L2 ◽  
Prime Target

The present study investigated the influence of orthographic input on the recognition of second language (L2) spoken words with phonological variants, when first language (L1) and L2 have different orthographic structures. Lexical encoding for intermediate-to-advanced level Mandarin learners of Korean was assessed using masked cross-modal and within-modal priming tasks. Given that Korean has obstruent nasalization in the syllable coda, prime target pairs were created with and without such phonological variants, but spellings that were provided in the cross-modal task reflected their unaltered, nonnasalized forms. The results indicate that when L2 learners are exposed to transparent alphabetic orthography, they do not show a particular cost for spoken word recognition of L2 phonological variants as long as the variation is regular and rule-governed.

Contemporary model of language organization: an overview for neurosurgeons

2015 ◽  
Vol 122 (2) ◽  
pp. 250-261 ◽  
Author(s):  
Edward F. Chang ◽  
Kunal P. Raygor ◽  
Mitchel S. Berger
Keyword(s):  
Speech Processing ◽  
Phonological Processing ◽  
Semantic Processing ◽  
Functional Organization ◽  
Inferior Frontal Gyrus ◽  
Superior Temporal Gyrus ◽  
Functional Neuroanatomy ◽  
Additional Information ◽  
Dorsal Pathway ◽  
Subcortical Mapping

Classic models of language organization posited that separate motor and sensory language foci existed in the inferior frontal gyrus (Broca's area) and superior temporal gyrus (Wernicke's area), respectively, and that connections between these sites (arcuate fasciculus) allowed for auditory-motor interaction. These theories have predominated for more than a century, but advances in neuroimaging and stimulation mapping have provided a more detailed description of the functional neuroanatomy of language. New insights have shaped modern network-based models of speech processing composed of parallel and interconnected streams involving both cortical and subcortical areas. Recent models emphasize processing in “dorsal” and “ventral” pathways, mediating phonological and semantic processing, respectively. Phonological processing occurs along a dorsal pathway, from the posterosuperior temporal to the inferior frontal cortices. On the other hand, semantic information is carried in a ventral pathway that runs from the temporal pole to the basal occipitotemporal cortex, with anterior connections. Functional MRI has poor positive predictive value in determining critical language sites and should only be used as an adjunct for preoperative planning. Cortical and subcortical mapping should be used to define functional resection boundaries in eloquent areas and remains the clinical gold standard. In tracing the historical advancements in our understanding of speech processing, the authors hope to not only provide practicing neurosurgeons with additional information that will aid in surgical planning and prevent postoperative morbidity, but also underscore the fact that neurosurgeons are in a unique position to further advance our understanding of the anatomy and functional organization of language.

scholarly journals fMRI Evidence for Cortical Modification during Learning of Mandarin Lexical Tone

2003 ◽  
Vol 15 (7) ◽  
pp. 1019-1027 ◽  
Author(s):  
Yue Wang ◽  
Joan A. Sereno ◽  
Allard Jongman ◽  
Joy Hirsch
Keyword(s):  
Second Language ◽  
Inferior Frontal Gyrus ◽  
Superior Temporal Gyrus ◽  
Broca’S Area ◽  
Lexical Tone ◽  
Broca's Area ◽  
Language Functions ◽  
Before And After ◽  
Cortical Regions ◽  
Wernicke’S Area

Functional magnetic resonance imaging was employed before and after six native English speakers completed lexical tone training as part of a program to learn Mandarin as a second language. Language-related areas including Broca's area, Wernicke's area, auditory cortex, and supplementary motor regions were active in all subjects before and after training and did not vary in average location. Across all subjects, improvements in performance were associated with an increase in the spatial extent of activation in left superior temporal gyrus (Brodmann's area 22, putative Wernicke's area), the emergence of activity in adjacent Brodmann's area 42, and the emergence of activity in right inferior frontal gyrus (Brodmann's area 44), a homologue of putative Broca's area. These findings demonstrate a form of enrichment plasticity in which the early cortical effects of learning a tone-based second language involve both expansion of preexisting language-related areas and recruitment of additional cortical regions specialized for functions similar to the new language functions.

Frequency effects and second language lexical acquisition

2014 ◽  
Vol 19 (3) ◽  
pp. 301-332 ◽  
Author(s):  
Scott Crossley ◽  
Tom Salsbury ◽  
Ashley Titak ◽  
Danielle McNamara
Keyword(s):  
Second Language ◽  
Language Acquisition ◽  
Language Learning ◽  
Word Frequency ◽  
Lexical Acquisition ◽  
Absolute Frequency ◽  
Frequency Effects ◽  
L2 Learners ◽  
Post Hoc ◽  
L1 And L2

Frequency effects in an L1 and L2 longitudinal corpus were investigated using Zipfian distribution analyses and linear curve estimations. The results demonstrated that the NS lexical input exhibited Zipfian distributions, but that the L2 lexical output did not match the NS Zipfian patterns. Word frequency analyses indicated that NS interlocutors modify their lexicon such that frequency scores decrease as a function of time that L2 learners have studied English. In contrast, the word frequency scores for the L2 output increased as a function of time. Post-hoc analyses indicated that differences in frequency scores between NS input and L2 output were best explained by the repetition of infrequent words, but not frequent words by L2 learners in the early stages of language acquisition. The results question absolute frequency interpretations of lexical acquisition for L2 learners and provide evidence for usage-based approaches for language learning.

Examining the Temporal Development of Phonetic and Lexical Learning in Second Language

2017 ◽  
Vol 120 (5) ◽  
pp. 785-804 ◽  
Author(s):  
Jeong-Im Han ◽  
Moongee Jeon ◽  
Sujin Oh
Keyword(s):  
Second Language ◽  
Lexical Processing ◽  
Early Stage ◽  
Lexical Representations ◽  
L2 Learners ◽  
Processing Abilities ◽  
Sound Discrimination ◽  
Sound Category ◽  
L1 And L2 ◽  
Phonetic Categorization

The purpose of this study was to investigate how second-language (L2) learners lexically encode confusable phonemes. Given the inconsistency of previous studies on whether and if so how learners can establish separate lexical representations of confusable categories, we examined (1) how phonetic categorization and lexical encoding abilities were developed at the early stage of learning and (2) whether there are any differences in those abilities between the words with a sound pair from a corresponding native language (L1)-dominant category and those lacking such category. Native speakers of Korean learned Arabic words with these two types of sound pairs for four days and then their phonetic categorization and lexical processing abilities were evaluated in AXB discrimination and lexical decision tasks, respectively. The results showed that phonetic categorization of the words with a sound pair from an L1-dominant category developed very early. With success in their discrimination abilities, L2 learners began to overcome lexical competition from the words with such a sound pair. By contrast, learners showed poor sound discrimination and lexical encoding skills for words with a sound pair lacking an L1-dominant category. This suggests that (1) L2 learners’ accurate phonetic categorization abilities are prerequisite to success in L2 lexical encoding and (2) lexical representations of the L2 words with confusable phonemes depend on the distinct types of sound category matchup between L1 and L2.

scholarly journals How much vocabulary is needed to use English? Replication of van Zeeland & Schmitt (2012), Nation (2006) and Cobb (2007)

2015 ◽  
Vol 50 (2) ◽  
pp. 212-226 ◽  
Author(s):  
Norbert Schmitt ◽  
Tom Cobb ◽  
Marlise Horst ◽  
Diane Schmitt
Keyword(s):  
Second Language ◽  
Listening Comprehension ◽  
Learning Opportunities ◽  
Vocabulary Knowledge ◽  
Word Knowledge ◽  
Word Families ◽  
Written Texts ◽  
L2 Learners ◽  
Knowledge Requirements ◽  
Esl Learners

There is current research consensus that second language (L2) learners are able to adequately comprehend general English written texts if they know 98% of the words that occur in the materials. This important finding prompts an important question: How much English vocabulary do English as a second language (ESL) learners need to know to achieve this crucial level of known-word coverage? A landmark paper by Nation (2006) provides a rather daunting answer. His exploration of the 98% figure through a variety of spoken and written corpora showed that knowledge of around 8,000–9,000 word families is needed for reading and 6,000–7,000 for listening. But is this the definitive picture? A recent study by van Zeeland & Schmitt (2012) suggests that 95% coverage may be sufficient for listening comprehension, and that this can be reached with 2,000–3,000 word families, which is much more manageable. Getting these figures right for a variety of text modalities, genres and conditions of reading and listening is essential. Teachers and learners need to be able to set goals, and as Cobb's study of learning opportunities (2007) has shown, coverage percentages and their associated vocabulary knowledge requirements have important implications for the acquisition of new word knowledge through exposure to comprehensible L2 input. This article proposes approximate replications of Nation (2006), van Zeeland & Schmitt (2012), and Cobb (2007), in order to clarify these key coverage and size figures.

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