Lexical Plasticity in Early Bilinguals Does Not Alter Phoneme Categories: I. Neurodynamical Modeling

2008 ◽  
Vol 20 (1) ◽  
pp. 76-94 ◽  
Author(s):  
J.P. Larsson ◽  
Fátima Vera Constán ◽  
Núria Sebastián-Gallés ◽  
Gustavo Deco
Keyword(s):  
Discrimination Task ◽  
Lexical Processing ◽  
Mean Field ◽  
Lexical Representation ◽  
Decision Task ◽  
Experimental Conditions ◽  
Initial Exposure ◽  
Phoneme Discrimination ◽  
Performance Asymmetry ◽  
Phonemic Level

Sebastián-Gallés et al. [The influence of initial exposure on lexical representation: Comparing early and simultaneous bilinguals. Journal of Memory and Language, 52, 240–255, 2005] contrasted highly proficient early Spanish-Catalan and Catalan-Spanish bilinguals, using Catalan materials in a lexical decision task (LDT). They constructed two types of experimental pseudowords, substituting Catalan phoneme /e/ for Catalan /ɛ/, or vice versa. Catalan-dominant bilinguals showed a performance asymmetry across experimental conditions, making more mistakes for /ɛ/→/e/ changes, than for /e/→/ɛ/ ones. This was considered evidence of a developed acceptance of mispronounced Catalan /ɛ/-words, caused by exposure to a bilingual environment where mispronunciations by Spanish-dominant bilinguals using their /e/-category abound. Although this indicated modified or added lexical representations, an open issue is whether such lexical information also modifies phoneme categories. We address this using a biophysically realistic neurodynamic model, describing neural activity at the synaptic and spiking levels. We construct a network of pools of neurons, representing phonemic and lexical processing. Carefully analyzing the dependency of network dynamics on connection strengths, by first exploring parameter space under steady-state assumptions (mean-field scans), then running spiking simulations, we investigate the neural substrate role in a representative LDT. We also simulate a phoneme discrimination task to address whether lexical changes affect the phonemic level. We find that the same network configuration which displays asymmetry in the LDT shows equal performance discriminating the two modeled phonemes. Thus, we predicted that the Catalan-dominant bilinguals do not alter their phoneme categories, although showing signs of having stored a new word variation in the lexicon. To explore this prediction, a syllable discrimination task involving the /e/-/ɛ/ contrast was set up, using Catalan-dominants displaying performance asymmetry in a repetition of the original LDT. Discrimination task results support the prediction, showing that these subjects discriminate both categories equally well. We conclude that subjects often exposed to dialectal word variations can store these in their lexicons, without altering their phoneme representations.

scholarly journals The use and nature of grapheme coding during sub-lexical processing and lexical access

2018 ◽  
Vol 71 (6) ◽  
pp. 1324-1339 ◽  
Author(s):  
Eva Commissaire ◽  
Séverine Casalis
Keyword(s):  
Lexical Access ◽  
Lexical Processing ◽  
Stimulus Onset ◽  
Detection Task ◽  
Single Letter ◽  
Decision Task ◽  
Letter Detection ◽  
Experimental Conditions ◽  
Lexical Route

This work aimed to investigate grapheme coding during sub-lexical processing and lexical access. Using the letter detection task in Experiment 1, we compared letter pairs that could be considered as a grapheme unit or not depending on context (referred to as weakly cohesive complex, e.g., an in chant vs cane) to real two-letter graphemes (highly cohesive complex, e.g., au in chaud) and single-letter graphemes (simple, e.g., a in place). Three experimental conditions were used, one of which was designed to prevent phonological influences. Data revealed that only highly cohesive complex graphemes were processed as units, not the weakly cohesive ones. The same pattern was found across experimental conditions in favor of an orthographic mechanism. In Experiments 2 and 3, a primed lexical decision task was used with two stimulus onset asynchronies (SOAs) and two different ranges of lexical frequency. We manipulated the number of graphemes removed from partial primes ( d**che vs do**he-DOUCHE) and relatedness. In contrast to Experiment 1, no evidence was provided in favor of a role of graphemes during lexical access. We suggest that graphemes can be conceived as sub-lexical orthographic units per se but can only be captured within a sub-lexical route to reading.

Electrifying the lexical decision

2015 ◽  
Vol 10 (3) ◽  
pp. 339-363 ◽  
Author(s):  
Nancy Azevedo ◽  
Ruth Ann Atchley ◽  
Eva Kehayia
Keyword(s):  
Lexical Decision ◽  
Lexical Decision Task ◽  
Lexical Access ◽  
Undergraduate Students ◽  
Lexical Processing ◽  
Lexical Representation ◽  
Decision Task ◽  
Lexical Status ◽  
Word Level ◽  
Four Blocks

The current research utilizes lexical decision within an oddball ERP paradigm to study early lexical processing. Nineteen undergraduate students completed four blocks of the oddball lexical decision task (Nonword targets among Words, Word targets among Nonwords, Word targets among Pseudowords, and Pseudoword targets among Words). We observed a reliable P3 ERP component in conditions where the distinction between rare and frequent trials could be made solely based on lexical status (Words among Nonwords and Nonwords among Words). We saw a reliable P3 to rare words among frequent pseudowords, but no P3 was observed when participants were asked to detect pseudowords in the context of frequent word stimuli. We argue that this observed modulation of the P3 results is consistent with psycholinguistic literature that suggests that two criteria are available during lexical access when performing a lexicality judgement, a non-lexical criterion that relies on global activation at the word level and a lexical criterion that relies on activation of a lexical representation (Coltheart, Rastle, Perry, Langdon, & Ziegler, 2001; Grainger & Jacobs, 1996).

Lateralization of lexical processing in monolinguals and bilinguals

2021 ◽  
pp. 136700692110188
Author(s):  
Filiz Mergen ◽  
Gulmira Kuruoglu
Keyword(s):  
Lexical Processing ◽  
Response Times ◽  
Visual Fields ◽  
Decision Task ◽  
Bilingual Speakers ◽  
Visual Hemifield ◽  
Significant Difference ◽  
Brain Correlates ◽  
Orthographic Neighbors

Aims and objectives: This study aims to investigate how lexical processing (LP) is organized in early Turkish–English bilinguals and Turkish monolinguals. Methodology: We used a visual hemifield paradigm where bilingual ( n = 48) and monolingual ( n = 53) participants performed a lexical decision task. Bilingual participants performed the task in both their languages. Data and analysis: We recorded response times (RTs) and the accuracy rates (ARs) of the participants. An analysis of variance and t-test were run to analyze the bilingual and monolingual data, respectively. Findings: The results obtained from the analysis of the RTs and ARs for the Turkish and English words showed a balanced hemispheric organization in LP in bilingual speakers. The RTs for Turkish words in the monolingual group provided supportive evidence for the predominant role of the left hemisphere in LP. However, no significant difference was found in the accuracy of their answers, suggesting that the monolingual participants’ performance was not influenced by visual field of presentation of the words. Finally, the comparison of the two groups revealed that bilingual participants’ performance was inferior to monolinguals’ in speed and accuracy of processing of words presented in both visual fields. This result gives further support for the differential representation of LP in monolinguals and bilinguals. Originality: The psycholinguistic literature abounds with studies of LP in bilinguals and monolinguals from a variety of language backgrounds; however, there is much less data regarding the brain correlates of LP in Turkish–English bilinguals and Turkish monolinguals. Implications: Since Turkish–English bilinguals and Turkish monolinguals are underrepresented in the literature as compared to the population who speak other languages with alphabetic writing, this study provides preliminary data for future studies. Limitations: We did not control for gender or lexical factors such as orthographic neighbors when designing the word sets used as stimuli.

The Orthographic Consistency Effect in French and Spanish: Phoneme-to-Grapheme Mappings Influence Auditory Word Recognition

2021 ◽  
Author(s):  
Alberto Furgoni ◽  
Antje Stoehr ◽  
Clara D. Martin
Keyword(s):  
Word Recognition ◽  
Decision Task ◽  
Writing Systems ◽  
Auditory Lexical Decision ◽  
Auditory Word ◽  
Consistency Effect ◽  
Auditory Word Recognition ◽  
Phonemic Level ◽  
Phonological Unit ◽  
Orthographic Consistency

PurposeIn languages with alphabetical writing systems, the relationship between phonology and orthography is strong. Phonology-to-orthography mappings can be consistent (i.e., one phonological unit corresponds to one orthographic unit) or inconsistent (i.e., one phonological unit corresponds to multiple orthographic units). This study investigates whether the Orthographic Consistency Effect (OCE) emerges at the phonemic level during auditory word recognition, regardless of the opacity of a language’s writing system.MethodsThirty L1-French (opaque language) and 30 L1-Spanish (transparent language) listeners participated in an L1 auditory lexical decision task which included stimuli with either only consistently-spelled phonemes or both consistently-spelled and a number of inconsistently-spelled phonemes. ResultsThe results revealed that listeners were faster at recognizing consistently-spelled words than inconsistently-spelled words. This implies that consistently-spelled words are recognized more easily than inconsistent ones. As for pseudoword processing, there is a numerical trend that might indicate a higher sensibility of French listeners to phoneme-to-grapheme inconsistencies. ConclusionsThese findings have theoretical implications: inconsistent phoneme-to-grapheme mappings, like inconsistencies at the level of the syllable or rhyme, impact auditory word recognition. Moreover, our results suggest that the OCE should occur in all languages with alphabetical writing systems, regardless of their level of orthographic opacity.

scholarly journals Lateralızatıon of Non-Word Processıng in Monolınguals

2020 ◽  
Vol 15 ◽  
pp. 185-190
Author(s):  
Filiz Mergen ◽  
Gulmira Kuruoglu
Keyword(s):  
Lexical Decision ◽  
Lexical Decision Task ◽  
Left Hemisphere ◽  
Word Processing ◽  
Lexical Processing ◽  
Response Times ◽  
Hemispheric Dominance ◽  
Decision Task ◽  
Visual Hemifield ◽  
Overwhelming Evidence

A great bulk of research in the psycholinguistic literature has been dedicated to hemispheric organization of words. An overwhelming evidence suggests that the left hemisphere is primarily responsible for lexical processing. However, non-words, which look similar to real words but lack meaningful associations, is underrepresented in the laterality literature. This study investigated the lateralization of Turkish non-words. Fifty-three Turkish monolinguals performed a lexical decision task in a visual hemifield paradigm. An analysis of their response times revealed left-hemispheric dominance for non-words, adding further support to the literature. The accuracy of their answers, however, were comparable regardless of the field of presentation. The results were discussed in light of the psycholinguistic word processing views.

Priming Effects of Violence on Infrahumanization

2009 ◽  
Vol 12 (6) ◽  
pp. 699-714 ◽  
Author(s):  
Naira Delgado ◽  
Armando Rodríguez-Pérez ◽  
Jeroen Vaes ◽  
Jacques-Philippe Leyens ◽  
Verónica Betancor
Keyword(s):  
Lexical Decision ◽  
Lexical Decision Task ◽  
The Other ◽  
Decision Task ◽  
Human Suffering ◽  
Experimental Conditions ◽  
Priming Effects ◽  
Contextual Dependency ◽  
Underlying Mechanisms ◽  
Effects Of Violence

Two experiments examine whether exposure to generic violence can display infrahumanization towards out-groups. In Study 1, participants had to solve a lexical decision task after viewing animal or human violent scenes. In Study 2, participants were exposed to either human violent or human suffering pictures before doing a lexical decision task. In both studies, the infrahumanization bias appeared after viewing the human violent pictures but not in the other experimental conditions. These two experiments support the idea of contextual dependency of infrahumanization, and suggest that violence can prime an infrahuman perception of the out-group. Theoretical implications for infrahumanization and potential underlying mechanisms are discussed.

Saccades and Subjective Time in Seconds Range Duration Reproduction

2016 ◽  
Vol 4 (2) ◽  
pp. 187-206 ◽  
Author(s):  
Trevor B. Penney ◽  
Xiaoqin Cheng ◽  
Yan Ling Leow ◽  
Audrey Wei Ying Bay ◽  
Esther Wu ◽  
...  
Keyword(s):  
Discrimination Task ◽  
Test Phase ◽  
Covert Attention ◽  
Visual Modality ◽  
Subjective Time ◽  
Auditory Modality ◽  
Attention Shift ◽  
Experimental Conditions ◽  
Perceptual Stability ◽  
Time Distortion

A transient suppression of visual perception during saccades ensures perceptual stability. In two experiments, we examined whether saccades affect time perception of visual and auditory stimuli in the seconds range. Specifically, participants completed a duration reproduction task in which they memorized the duration of a 6 s timing signal during the training phase and later reproduced that duration during the test phase. Four experimental conditions differed in saccade requirements and the presence or absence of a secondary discrimination task during the test phase. For both visual and auditory timing signals, participants reproduced longer durations when the secondary discrimination task required saccades to be made (i.e., overt attention shift) during reproduction as compared to when the discrimination task merely required fixation at screen center. Moreover, greater total saccade duration in a trial resulted in greater time distortion. However, in the visual modality, requiring participants to covertly shift attention (i.e., no saccade) to complete the discrimination task increased reproduced duration as much as making a saccade, whereas in the auditory modality making a saccade increased reproduced duration more than making a covert attention shift. In addition, we examined microsaccades in the conditions that did not require full saccades for both the visual and auditory experiments. Greater total microsaccade duration in a trial resulted in greater time distortion in both modalities. Taken together, the experiments suggest that saccades and microsaccades affect seconds range visual and auditory interval timing via attention and saccadic suppression mechanisms.

scholarly journals Unstressed Vowel Reduction Across Majorcan Catalan Dialects: Production and Spoken Word Recognition

2017 ◽  
Vol 61 (3) ◽  
pp. 430-465 ◽  
Author(s):  
Miquel Llompart ◽  
Miquel Simonet
Keyword(s):  
Word Recognition ◽  
Lexical Processing ◽  
Spoken Word Recognition ◽  
Spoken Word ◽  
Decision Task ◽  
Vowel Duration ◽  
Lexical Representations ◽  
Production Study ◽  
Speech Performance

This study investigates the production and auditory lexical processing of words involved in a patterned phonological alternation in two dialects of Catalan spoken on the island of Majorca, Spain. One of these dialects, that of Palma, merges /ɔ/ and /o/ as [o] in unstressed position, and it maintains /u/ as an independent category, [u]. In the dialect of Sóller, a small village, speakers merge unstressed /ɔ/, /o/, and /u/ to [u]. First, a production study asks whether the discrete, rule-based descriptions of the vowel alternations provided in the dialectological literature are able to account adequately for these processes: are mergers complete? Results show that mergers are complete with regards to the main acoustic cue to these vowel contrasts, that is, F1. However, minor differences are maintained for F2 and vowel duration. Second, a lexical decision task using cross-modal priming investigates the strength with which words produced in the phonetic form of the neighboring (versus one’s own) dialect activate the listeners’ lexical representations during spoken word recognition: are words within and across dialects accessed efficiently? The study finds that listeners from one of these dialects, Sóller, process their own and the neighboring forms equally efficiently, while listeners from the other one, Palma, process their own forms more efficiently than those of the neighboring dialect. This study has implications for our understanding of the role of lifelong linguistic experience on speech performance.

Children’s and adults’ initial phonological acquisition of a foreign language

2019 ◽  
Vol 5 (3) ◽  
pp. 374-401
Author(s):  
Romana Kopečková ◽  
Christine Dimroth ◽  
Ulrike Gut
Keyword(s):  
Individual Differences ◽  
Adult Learners ◽  
Foreign Language ◽  
Discrimination Task ◽  
Phonological Acquisition ◽  
Phoneme Discrimination ◽  
Sentence Imitation ◽  
German Children ◽  
L2 Perception

Abstract This study compared children’s and adults’ L2 perception and production in the first hours of exposure to a foreign language. A total of 10 German children and 19 German adults performed a phoneme discrimination task and a sentence imitation task in Polish at two testing times. Exposed to a comparable input, the adult learners were found to perceive Polish sibilant contrasts more accurately than their child counterparts and to maintain this advantage over a two-week-long instruction. However, the two groups did not differ in their developing ability to produce the tested sibilants. A great deal of inter- and intra-individual differences in both learner groups was also attested. Our findings suggest that young L2 instructed learners are not necessarily better and/or faster perceivers and producers of novel language sounds than adult L2 instructed learners, who are able to discriminate a range of novel sibilant pairs even after very limited L2 exposure.

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