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Increasing cultural and linguistic diversity among children and families brings new challenges for early intervention professionals. The purpose of this study was to identify the specific roles and needs of speech-language pathologists (SLPs) who practice in early intervention settings with culturally and linguistically diverse families of d/Deaf multilingual learners (DMLs). Thirteen SLPs completed an online survey about their practices and needs. Interviews were conducted with five parents of DMLs. Results showed that SLPs have lower self-satisfaction with families of DMLs compared to mainstream families. Parents were highly satisfied with the support they received. Both groups of participants reported a need for specific tools or adaptations, especially if there was no shared language. Thematic analysis identified three themes: communication and partnership, professional resources for responding to diversity, and diversity of parental profiles. This article provides an insight into the perspectives of both professionals and culturally and linguistically diverse parents, and identifies specific aspects of early intervention services with parents of DMLs: developing partnership in the context of cultural and/or linguistic differences, discussing topics related to multilingualism, and providing highly adaptable family-centered services.

Narrative skills are highly predictive of linguistic development as well as future school performances. Yet, children with low socio-economic status (SES) background present specific difficulties for these skills. Interactive reading sessions could have beneficial effects on narrative capacities. We analyze the effects of an IR intervention program on the narratives of children from a low SES, on macrostructural and microstructural parameters. Thirty IR sessions were proposed to 172 children. A control group (N = 87) benefited of the usual activities of class. Narrative skills were measured with the Edmonton Narrative Norms Instrument (ENNI) and productions were transcribed via CHILDES. The results did not highlight a significant difference between groups concerning the macrostructural parameters. However microstructural parameters improved significantly in the experimental group as regards lexical, discursive and sentence components., SCOPUS: ar.j, info:eu-repo/semantics/published

Children with low socioeconomic status and language-minority backgrounds generally have weak precursory skills (language and emergent literacy) for learning written language. These skills can be stimulated through interactive reading sessions. Our innovative study for French-speaking Belgium aimed to evaluate the effects of an interactive reading intervention in kindergarten classes, including children with a low socioeconomic status and a language-minority background. The convenience sample consisted of eight schools with differentiated teaching in Brussels city-center. The treatment group, which benefits from interactive reading sessions, include 11 classes (N = 194) and the control group was comprised of eight classes (N = 91). The teachers of the treatment group worked with their class during 30 sessions of interactive reading (3 sessions/week). Pre and post-intervention language and emergent literacy measures were conducted. Children from the treatment group evolved significantly better in postintervention for language (vocabulary, morphosyntax) and emergent literacy skills (print awareness, letter knowledge and phonological awareness), compared to the control group. The implications for kindergarten curricula are discussed., SCOPUS: ar.j, info:eu-repo/semantics/published

Recent research found that sexualized bodies are visually processed similarly to objects. This article examines the effects of skin-to-clothing ratio and posture suggestiveness on cognitive objectification. Participants were presented images of upright versus inverted bodies while we recorded the N170. We used the N170 amplitude inversion effect (larger N170 amplitudes for inverted vs. upright stimuli) to assess cognitive objectification, with no N170 inversion effect indicating less configural processing and more cognitive objectification. Contrary to Hypothesis 1, skin-to-clothing ratio was not associated with cognitive objectification (Experiments 1-3). However, consistent with Hypothesis 2, we found that posture suggestiveness was the key driver of cognitive objectification (Experiment 2), even after controlling for body asymmetry (Experiment 3). This article showed that high (vs. low) posture suggestiveness caused cognitive objectification (regardless of body asymmetry), whereas high (vs. low) skin-to-clothing ratio did not. The implications for objectification and body perception literatures are discussed., SCOPUS: ar.j, info:eu-repo/semantics/published

At an early stage of visual processing, human faces and bodies are typically associated with larger N170s when presented in an inverted (vs. upright) position, indexing the involvement of configural processing. We challenged this view and hypothesized that sexualized bodies would not be sensitive to inversion, thereby suggesting that they would be processed similarly to objects. Participants saw sexualized male and female bodies, nonsexualized male and female bodies, as well as objects in both upright and inverted positions while we recorded the N170. Results indicated that inverted (vs. upright) nonsexualized male and female bodies were associated with larger N170 amplitudes. In contrast, no N170 amplitude inversion effect emerged for sexualized male and female bodies or objects. These results suggest that sexualized bodies are processed similarly to objects and quite differently than nonsexualized bodies. We discuss the results and their implications in the light of the literatures in person perception and objectification.

Introduction Many authors agree on the importance of training parents in early literacy strategies. Objective This study analyses the effects of an intervention to improve parent–child interactions during reading sessions, using interactive reading techniques. Method The design is exploratory and includes a treatment group (n = 22), which benefited from four interactive reading workshops, and a control group (n = 18), which did not benefit from specific training. Both groups read the same books, three times a week, for 10 weeks. The children come from middle socioeconomic backgrounds and attend preschool or kindergarten (grades 1–3). Results The analyses were conducted on the basis of pre- and post-intervention video observations, coded using the Adult–Child Interactive Reading Inventory (ACIRI). Results from an ANCOVA show that parental behavior, and in turn child behavior, improves in post-intervention: parents improve their children's attention to the text and implement literacy strategies, while the children become more involved in the interactions. Conclusion Interactive reading workshops for parents improve the quantity and quality of parent–child interactions when reading books in a natural and playful context.

Purpose Children with dyslexia have been suggested to experience deficits in both categorical perception (CP) and speech identification in noise (SIN) perception. However, results regarding both abilities are inconsistent, and the relationship between them is still unclear. Therefore, this study aimed to investigate the relationship between CP and the psychometric function of SIN perception. Method Sixteen children with dyslexia, 16 chronological-age controls, and 16 reading-level controls were evaluated in CP of a voicing continuum and in consonant identification in both stationary and fluctuating noises. Results There was a small but significant impairment in speech identification performance of children with dyslexia in stationary noise compared with chronological age–matched controls (but not reading level–matched controls). However, their performance increased in a fluctuating background, hence suggesting normal masking and unmasking effects and preserved sensory processing of speech information. Regarding CP, location of the phoneme boundary differed in the children with dyslexia compared with both control groups. However, scrutinizing individual profiles failed to reveal consistently poor performance in SIN and CP tasks. In addition, there was no significant correlation between CP, SIN perception, and reading scores in the group with dyslexia. Conclusions The relationship between the SIN deficit and CP, and how they potentially affect reading in children with dyslexia, remains unclear. However, these results are inconsistent with the notion that children with dyslexia suffer from a low-level temporal processing deficit and rather suggest a role of nonsensory (e.g., attentional) factors in their speech perception difficulties.

Objective This study was designed to test the effect of the featured/featureless nature of deviant stimuli on mismatch negativity (MMN), P300 (P3a and P3b) and on behavioral discrimination performances. Methods Ten healthy adults were submitted to stimuli contrasted by the presence or absence of a frequency sweep. Discrimination performances were collected during the neurophysiological sessions. Results MMN, P3a and P3b were much larger for featured deviants than for featureless ones. Behavioral data ( d ', at ceiling level, and reaction times) were not affected by the featured/featureless nature of the deviant stimulus. Conclusion Behavioral results and MMN amplitudes are in accordance with our previous study, using the same design albeit in an ignore condition and with collection of the behavioral data deferred until after the neurophysiological sessions. The present study strengthens previous evidence suggesting that two mechanisms contribute to the MMN evoked by featured deviants: the memory comparison process and the adaptation/fresh-afferent phenomenons. Significance We here demonstrate that the neurophysiological processes underlying P300 generation are also impacted by the featured/featureless nature of the deviant stimulus and that the dissociation from behavioral data, which are not impacted, is also observed when both types of data are recorded simultaneously.

OBJECTIVES: Interference between a target and simultaneous maskers occurs both at the cochlear level through energetic masking and more centrally through informational masking (IM). Hence, quantifying the amount of IM requires a strict control of the energetic component. Presenting target and maskers on different sides (i.e., dichotically) reduces energetic masking but provides listeners with important lateralization cues that also drastically reduce IM. The main purpose of this study (Experiment 1) was to evaluate a “switch” manipulation aiming at restoring most of the IM despite dichotic listening. Experiment 2 was designed to investigate the source of the difficulty induced by this switching dichotic condition. DESIGN: In Experiment 1, the authors presented 60 normal-hearing young adults with a detection task in which a regularly repeating target was embedded in a randomly varying background masker. The authors evaluated spatial masking release induced by three different dichotic listening conditions in comparison with a diotic baseline. Dichotic stimuli were presented in either a nonswitching or a switching condition. In the latter case, the presentation sides of dichotic target and maskers alternated several times throughout 10 sec sequences. The impact of the number of switches on IM was investigated parametrically, with both pure and complex tone sequences. In Experiment 2, the authors compared performance of 13 young, normal-hearing listeners in a monotic and dichotic version of the rapidly switching condition, using pure-tone sequences. RESULTS: When target and maskers switched rapidly within sequences, IM was significantly stronger than in nonswitching dichotic sequences and was comparable with the masking effect induced by diotic sequences. Furthermore, Experiment 2 suggests that rapidly switching target and maskers prevent listeners from relying on lateralization cues inherent to the dichotic condition, hence preserving important amounts of IM. CONCLUSIONS: This paradigm thus provides an original tool to isolate IM in signal and maskers having overlapping spectra.

Recent research found that configural information is less important for the processing of sexualized bodies than for the processing of nonsexualized bodies. The present investigation aims to expand these findings by directly manipulating configural versus analytic processing of sexualized and nonsexualized bodies. We posited that disrupting first-order relational information through scrambling should be associated with larger N170 amplitudes (scrambling effect) for nonsexualized bodies, whereas the scrambling manipulation should not modulate N170 amplitudes associated with sexualized bodies and objects. We presented images of scrambled versus intact sexualized bodies, nonsexualized bodies, and objects while the N170 was recorded. Consistent with our hypothesis, we found that the scrambling manipulation was associated with larger N170 amplitudes for nonsexualized bodies (i.e. scrambling effect), whereas no scrambling effect emerged for sexualized bodies and objects. This research is the first to show that sexualized bodies are processed analytically at a neural level. Implications for the literature in body perception and objectification will be discussed.

Different language development deficiencies are characterized by a deficit in phoneme perceptiontogether with an enhanced sensitivity to allophones. In order to modify such “allophonic perception”,the RapDys© program proceeds by progressive reinforcement of increasingly smalleracoustic differences between two different phonemes, with substantial effects of RapDys© onphonemic awareness in both dysphasic and dyslexic children, as well as positive effects on readingperformances., Diferentes trastornos del desarrollo del lenguaje se caracterizan por un déficit en la percepcióndel fonema junto con una mayor sensibilidad a los alófonos. Para modificar esta “percepción alofónica”,el programa RapDys© procede mediante un refuerzo progresivo de diferencias acústicascada vez más pequeñas entre dos fonemas diferentes, con efectos sustanciales de RapDys© sobrela conciencia fonológica tanto en niños disléxicos como disfásicos, como también efectos positivossobre la ejecución lectora., Différents troubles du développement du langage se caractérisent par un déficit de perception desphonèmes et par une plus grande sensibilité aux allophones. Afin de modifier cette « perceptionallophonique », la méthode RapDys© procède par renforcement progressif de la perception dedifférences acoustiques de plus en plus fines entre deux phonèmes, avec des effets positifs surla conscience phonologique et sur les performances de lecture chez des enfants dysphasiques oudyslexiques.

Studies investigating event-related potential (ERP) evoked in a Cue-Go/NoGo paradigm have shown lower frontal N1, N2 and central P3 in children with attention-deficit/hyperactivity disorder (ADHD) compared to typically developing children (TDC). However, the electroencephalographic (EEG) dynamics underlying these ERPs remain largely unexplored in ADHD., SCOPUS: ar.j, info:eu-repo/semantics/published

International audience; How far can acquired knowledge such as orthographic knowledge affect pre-existing abilities such as speech perception? This controversial issue was addressed by investigating the automaticity of the influence of orthographic knowledge on speech processing. Many studies demonstrated this influence in active, lexico-semantic speech processing tasks. However, it has never been observed when speech is unattended. Here, the Mismatch Negativity (MMN), an automatic index of experience-dependent auditory traces, was recorded in an unattended oddball paradigm manipulating the orthographic congruency between frequent and deviant spoken riming words. Both orthographically congruent and incongruent deviant words elicited a typical MMN over the fronto-central regions, with a stronger response in the incongruent condition. The finding showed that the orthographic dimension of spoken words influences a physiological marker of speech processing although participants were required not to attend to the auditory input. This provides evidence for an impact of acquiring a written code on speech processing.

This study compares behavioral and electrophysiological (P300) responses recorded in a cued continuous performance task (CPT-AX) performed by children with attention deficit hyperactivity disorder-combined subtype (ADHD-com) and age-matched healthy controls. P300 cognitive-evoked potentials and behavioral data were recorded in eight children with ADHD (without comorbidity) and nine control children aged 8-12 years while performing a CPT-AX task. Such task enables to examine several kinds of false alarms and three different kinds of P300 responses: the "Cue P300", the "Go P300" and the "NoGo P300", respectively, associated with preparatory processing/attentional orienting, motor/response execution and motor/response inhibition. Whereas hit rates were about 95% in each group, ADHD children made significantly more false alarm responses (inattention- and inhibition-related) than control children. ADHD children had a marginally smaller Cue P300 than the control children. Behavioral and electrophysiological findings both highlighted inhibition and attention deficits in ADHD-com children in the CPT-AX task. A rarely studied kind of false alarm, the "Other" FA, seems to be a sensitive FA to take into account, even if its interpretation remains unclear.

Mixed emotions can refer to the experience of two emotions of opposite valence such as happy and sad (Larsen et al. 2001; Williams and Aaker 2002) but researchers also use this term to describe concurrent experiences of two emotions of the same valence such as fear and regret (Grasshoff and Williams 2005). A consensus does not seem to have been found on the definition of mixed emotions, and the debate continues about the possibility to feel two opposite valence emotions at the same time (Larsen et al. 2001; Oceja and Carrera 2009; Larsen and McGraw 2011; Larsen and Green 2013). Two main models oppose, Russell’s (1980; Russell and Carroll 1999) valence–arousal model and Cacioppo and Berntson’s (1994) Evaluative Space Model (ESM). The first one argues that positive and negative emotions, as two opposite ends of a bipolar continuum, are mutually exclusive like feelings of hot and cold (Schimmack 2001) and so cannot be felt at the same time. The second one contends that positive and negative emotions characterizing valence are two separable dimensions (Larsen et al. 2001) allowing, for instance, emotions of happiness and sadness to co-occur like hunger and thirst (Schimmack 2001).

The aim of the present study was to investigate the effect of auditory training on voicing perception in French children with specific language impairment (SLI). We used an adaptive discrimination training that was centred across the French phonological boundary (0 ms voice onset time – VOT). One group of nine children with SLI attended eighteen twenty-minute training sessions with feedback, and a control group of nine children with SLI did not receive any training. Identification, discrimination and categorical perception were evaluated before, during and after training as well as one month following the final session. Phonological awareness and vocabulary were also assessed for both groups. The results showed that children with SLI experienced strong difficulties in the identification, discrimination and categorical perception of the voicing continuum prior to training. However, as early as after the first nine training sessions, their performance in the identification and discrimination tasks increased significantly. Moreover, phonological awareness scores improved during training, whereas vocabulary scores remained stable across sessions.

International audience; Acquiring literacy establishes connections between the spoken and written system and modifies the functioning of the spoken system. As most evidence comes from on-line speech recognition tasks, it is still a matter of debate when and how these two systems interact in metaphonological tasks. The present event-related potentials study investigated the role and activation time course of the phonological and orthographic representations in an auditory same/different phoneme judgment task in which the congruency between phoneme and grapheme was orthogonally manipulated. We reported distinct time windows and topographies for phonological and orthographic effects. The phonological effect emerged early at central and parietal electrode sites and faded away later on, whereas the orthographic effect increased progressively, first observable at central and parietal sites before generalizing at the frontal site. These effects are clearly different from what has been reported in speech recognition tasks and suggest that our cognitive system is flexible enough to adjust its functioning to respond to the task demands in an optimal way.

OBJECTIVE: To look for the presence of neurophysiological correlates of language-general voicing boundaries in French by analyzing the morphology of two N100 subcomponents (N1b and T-complex). METHODS: /d/ and/t/ syllables with a voice onset time (VOT) value varying evenly from -75 and +75 ms were presented to French-speaking adults as stimuli for scalp-recorded auditory evoked-potentials. Morphologies and peak latencies of N1b and T-complex subcomponents were assessed. RESULTS: The Na subcomponent of the T-complex was double-peaked for VOT values below -30 ms and above +30 ms. N1b subcomponent revealed a double-peaked response above +30 ms VOT and a single-peaked response for all other VOT values. Whenever the response was double-peaked, there was a correlation between the VOT value and the N1b or Na supplementary peak latency. CONCLUSIONS: The combined morphologies of N1b and Na yield clear neurophysiological correlates of the language-general boundaries. For negative VOT values, the differential behavior of N1b and Na subcomponents suggests that only Na possesses physiological properties indexing the two language-general boundaries. SIGNIFICANCE: Rather than being lost, the universal sensitivity of human newborns to language-general boundaries remains present even if in some languages such as French, they do not separate phonological categories.

OBJECTIVES: Assess the feasibility of drawing tuning curves from the masking function of steady state potentials. Develop a noninvasive tool for research applications on cochlear frequency selectivity in sedated animals. Obtain pilot human data validating auditory steady state evoked potential-derived (ASSEP) tuning curves against psychophysical data. DESIGN: ASSEP tuning curves were drawn in 10 Beagle puppies and six human adults using amplitude-modulated probes. Two probe frequencies (1 and 2 kHz) were used in dogs and only one (2 kHz) in humans. The modulation rates of the two probes were set to 81 and 88 Hz, respectively. Psychophysical tuning curves were obtained in 12 normal human subjects using the same maskers and either a pure-tone or an amplitude-modulated probe to verify if the latter had a specific effect on tuning curve parameters. Six of these 12 subjects participated in the electrophysiologic measurements. For each tuning curve, the intensity of the narrowband masker required just to mask the fixed probe was plotted for different masker center frequencies. Masker center frequencies extended to about half an octave above and an octave below the probe frequencies in 100-Hz steps. Tuning curve width (Q10 dB values), high- and low-frequency slopes (in dB/octave) and the masker frequency yielding the lowest masking threshold (maximal masker frequency) were computed. Canine Q10 dB values obtained were compared with those published for several species with other techniques. For humans, ASSEP and psychophysical tuning curves were directly compared in the same subjects and with published data. RESULTS: In dogs, the ASSEP method yielded reproducible tuning curves with qualitative and quantitative parameters similar to other physiologic measures of tuning obtained in various animals. Q10 dB values were greater at 2 than at 1 kHz, reflecting the well-known correlation between sharpness of tuning and central frequency. In humans, ASSEP Q10 dB values were slightly smaller than the psychophysical ones, but were greater by a factor of 2 than those obtained with previously published electrophysiologic procedures. In both species, detuning-a shift of the tip of the curve away from the probe frequency-was frequently observed as upward shifts with a maximal value of 200 Hz. Human psychophysical tuning curves also showed a certain amount of upward detuning. The intraindividual comparison of the two types of probes performed on human subjects with the psychophysical method did not indicate a specific effect of the amplitude-modulated probe on the curve parameters. Neither did the intraindividual comparisons indicate that an amplitude-modulated probe per se promoted detuning. Detuning has been observed with several other techniques and is usually attributed to nonlinear interactions between masker and probe in simultaneous masking. CONCLUSIONS: The results demonstrate the feasibility of measuring realistic ASSEP tuning curves in sedated dogs and in sleeping human adults. The ASSEP tuning curves exhibit a series of classical features similar to those obtained with time-honored methods. These results pave the way for the development of a noninvasive electrophysiologic method for tuning curve recording and its applications in noncooperative experimental animals or clinical subjects., Journal Article, Research Support, Non-U.S. Gov't, SCOPUS: ar.j, info:eu-repo/semantics/published

OBJECTIVE: Rhythm perception appears to be non-linear as human subjects are better at discriminating, categorizing and reproducing rhythms containing binary vs non-binary (e.a. 1:2 vs 1:3) as well as metrical vs non-metrical (e.a. 1:2 vs 1:2.5) interval ratios. This study examined the representation of binary and non-binary interval ratios within the sensory memory, thus yielding a truly sensory, pre-motor, attention-independent neural representation of rhythmical intervals. METHODS: Five interval ratios, one binary, flanked by four non-binary ones, were compared on the basis of the MMN they evoked when contrasted against a common standard interval. RESULTS: For all five intervals, the larger the contrast was, the larger the MMN amplitude was. The binary interval evoked a significantly much shorter (by at least 23 ms) MMN latency than the other intervals, whereas no latency difference was observed between the four non-binary intervals. CONCLUSIONS: These results show that the privileged perceptual status of binary rhythmical intervals is already present in the sensory representations found in echoic memory at an early, automatic, pre-perceptual and pre-motor level. SIGNIFICANCE: MMN latency can be used to study rhythm perception at a truly sensory level, without any contribution from the motor system.

Cochlear implants mostly give excellent results especially when the implantation is done early in infancy. The idea of a «sensitive period» for an optimal development of language during the first years of life is relevant when we measure the effect of early vs. late implantation. When normal auditory input is available, the developing neural central system offers space and organization for the auditory process. When auditory input is deficient or absent, this organization cannot take place ;after several years of deprivation, the resorts needed are no more available for the auditory process, even in case of late restoration of auditory access. Even in case of early implantation, it appears of extended evidence that visual information (lip reading.) increase speech perception insofar as a phonetic complementis added to the impoverished signal delivered by the implant :The processes in play during the intermodal integration of visual and auditory information are related to phonetic coding and to the building of phonological and lexical representations of spoken language. © P.U.F., SCOPUS: re.j, info:eu-repo/semantics/published

Studies evaluating speech perception in noise have reported inconsistent results regarding a potential deficit in dyslexic children. So far, most of them investigated energetic masking. The present study evaluated situations inducing mostly informational masking, which reflects cognitive interference induced by the masker. Dyslexic children were asked to identify a female target syllable presented in quiet, babble, unmodulated, and modulated speech-shaped noise. Whereas their performance was comparable to normal-reading children in quiet, it dropped significantly in all noisy conditions compared to age-, but not reading level-matched controls. Interestingly, noise affected similarly the reception of voicing, place, and manner of articulation in dyslexic and normal-reading children.

This research assesses how audiovisual speech integration mechanisms are modulated by sensory and cognitive variables. For this purpose, the McGurk effect (McGurk & MacDonald, 1976) was used as an experimental paradigm. This effect occurs when participants are exposed to incongruent auditory and visual speech signals. For example, when an auditory /b/ is dubbed onto a visual /g/, listeners are led to perceive a fused phoneme like /d/. With the reverse presentation, they experience a combination such as /bg/. In two experiments, auditory intensity (40 dB, 50 dB, 60 dB, and 70 dB), face size (large: 19 × 23 cm and small: 1.8 × 2 cm) and instructions ("multiple choice" and "free response") were manipulated. Face size and instruction were between-participants variables in both experiments, whereas intensity was a within-participants variable in the first experiment and a between-participants variable in the second one. The main effect of instruction manipulation was highly significant in both experiments, the "multiple choice" condition giving rise to more illusions than the "free response" condition. Intensity was significant in the second experiment only. Illusions were more numerous at 40 dB than at the other three intensities. Finally, a small effect of face size was observed in the second experiment only, illusions being slightly more numerous with the large face. Those results indicate that the processing chain underlying audiovisual speech perception is modulated by the perceptual salience of the visual and auditory inputs as well as by cognitive variables. © 2005 Psychology Press Ltd., info:eu-repo/semantics/published

Noise typically induces both peripheral and central masking of an auditory target. Whereas the idea that a deficit of speech in noise perception is inherent to dyslexia is still debated, most studies have actually focused on the peripheral contribution to the dyslexics’ difficulties of perceiving speech in noise. Here, we investigated the respective contribution of both peripheral and central noise in three groups of children: dyslexic, chronological age matched controls (CA), and reading-level matched controls (RL). In all noise conditions, dyslexics displayed significantly lower performance than CA controls. However, they performed similarly or even better than RL controls. Scrutinizing individual profiles failed to reveal a strong consistency in the speech perception difficulties experienced across all noise conditions, or across noise conditions and reading-related performances. Taken together, our results thus suggest that both peripheral and central interference contribute to the poorer speech in noise perception of dyslexic children, but that this difficulty is not a core deficit inherent to dyslexia.

The aim of the present study was to investigate changes in voicing identification, discrimination, and categorical perception induced by identification training centered on three different training values. One group of French-speaking adults was trained across a universal auditory boundary (−30 ms voice onset time), and two other groups were trained across arbitrary boundaries (−45 or −60 ms voice onset time). A control group did not receive any training. The results showed that both the −30 and the −45 training groups exhibited a 10 ms shift in the identification boundary. Moreover, for the −30 training group, discrimination and categorical perception changed around the French phonological boundary. These results illustrate the possibility of modifying the French phonological perception after short-time training, particularly when centered on a universal boundary. However, training only had limited effects and even strengthened the phonological boundary, congruent with the hypothesis that this boundary is acquired by a perceptual “coupling” between universal boundaries.

In complex auditory scenes, perceiving a given target signal is often complicated by the presence of competing maskers. In addition to energetic masking (EM), which arises because of peripheral interferences between target and maskers at the cochlear level, informational masking (IM), which takes place at a more central level, is also responsible for the difficulties encountered in typical ecological auditory environments. While recent research has led to mixed results regarding a potential speech-perception-in-noise deficit in dyslexic children, most of them actually investigated EM situations. The current study aimed at evaluating dyslexic children's sensitivity to pure IM in complex auditory sequences. Performance of the control normally-reading children increased throughout the experiment, reaching a significantly better level than dyslexics' in the last blocks. Our results provide evidence for a general auditory deficit in noise in dyslexic children. Although due to central mechanisms, this deficit does not seem to stem from a mere auditory attention impairment. Further research is needed to examine the precise nature of the auditory difficulty, and its link with reading acquisition in dyslexic children.

Most usual speech masking situations induce both energetic and informational masking. Energetic masking (E.M.) arises because both signal and maskers contain energy in the same critical bands. Informational masking (I.M.) prevents the listeners from disentangling acoustical streams even when they are well separated in frequency, and is thought to reflect central mechanisms. In order to quantify I.M. without E.M. contamination in complex auditory situations, target and maskers can by presented dichotically. However, this manipulation provides the listeners with important lateralisation cues, which reduces I.M. Therefore, this study aimed at restoring a fair amount of I.M. using complex tones in a new dichotic paradigm. Regularly repeating signals and random-frequency multitone maskers were presented dichotically, but switched from one ear to the other within a 10s sequence. Switches could either appear at a slow or rapid rate. We compared listeners' detection performance in these switching situations to th...

Summary Aim Sign languages (SL), like oral languages (OL), organize elementary, meaningless units into meaningful semantic units. Our aim was to compare, at behavioral and neurophysiological levels, the processing of the location parameter in French Belgian SL to that of the rhyme in oral French. Participants and methods Ten hearing and 10 profoundly deaf adults performed a rhyme judgment task in OL and a similarity judgment on location in SL. Stimuli were pairs of pictures. Results As regards OL, deaf subjects’ performances, although above chance level, were significantly lower than that of hearing subjects, suggesting that a metaphonological analysis is possible for deaf people but rests on phonological representations that are less precise than in hearing people. As regards SL, deaf subjects scores indicated that a metaphonological judgment may be performed on location. The contingent negative variation (CNV) evoked by the first picture of a pair was similar in hearing subjects in OL and in deaf subjects in OL and SL. However, an N400 evoked by the second picture of the non-rhyming pairs was evidenced only in hearing subjects in OL. The absence of N400 in deaf subjects may be interpreted as the failure to associate two words according to their rhyme in OL or to their location in SL. Conclusion Although deaf participants can perform metaphonological judgments in OL, they differ from hearing participants both behaviorally and in ERP. Judgment of location in SL is possible for deaf signers, but, contrary to rhyme judgment in hearing participants, does not elicit any N400.

Several empirical lines of investigation support the idea that syllable-sized units may be involved in visual word recognition processes. In this perspective, the present study aimed at investigating further the nature of the process that causes syllabic effects in reading. To do so, the syllable frequency effect was investigated in French using event related potentials while participants performed a lexical decision task (Experiment 1). Consistent with previous studies, manipulating the frequency of the first syllable in words and pseudowords yielded two temporally distinct effects. Compared to items with a first syllable of low frequency, items with a syllable of high frequency elicited a weaker P200 component, reflecting early sub-lexical facilitation, and a larger N400 component, supposed to ensue from competition between syllabic neighbours. To examine which factors determine the strength of interference during lexical access, regression analyses were conducted on the late temporal window potentials. The inhibitory syllable frequency effect was best predicted by leader strength, that is, the frequency ratio between the most frequent syllabic neighbour and the others. When this variable was directly manipulated while controlling for syllable frequency and number of higher frequency syllabic neighbours (Experiment 2), electrophysiological data confirmed the impact of leader strength. The results are discussed in the context of interactive activation-based models augmented with syllabic representations.

Objective: This study was designed to separately test the effect of the cued/cueless nature of deviant stimuli and that of temporal distance between sound and deviance onsets on the mismatch negativity (MMN) as well as to look for discrepancies between behavioural discrimination performances and MMN amplitude when deviants are cueless. Methods: Ten healthy adults passively listened to stimuli that were contrasted by the presence or absence of a frequency sweep starting early or late within the sound. Discrimination performances were collected after the electrophysiological sessions. Results: MMNs were much larger for cued than for cueless deviants. The temporal distance between sound and deviance onsets affected MMNs evoked by both cued and cueless deviants, even to the point of abolishing the MMN when cueless deviance occurred late in the stimulus. Behavioural data were at ceiling levels for all conditions, contrasting with the absence of MMN evoked by cueless deviants with late onset. Conclusions: Two mechanisms contribute to the MMN evoked by cued deviants: the memory comparison process and the adaptation/fresh-afferent one. Within the temporal window of integration, the delay at which each component disappears is different. Significance: Comparing waveforms evoked by cued versus cueless deviants provides a fairly simple way of isolating the MMN memory-based component. © 2012 International Federation of Clinical Neurophysiology., SCOPUS: ar.j, info:eu-repo/semantics/published

Auditory steady-state evoked potential (ASSEP) tuning curves were compared to compound action potential (CAP) tuning curves, both measured at 2 Hz, using sedated beagle puppies. The effect of two types of masker (narrowband noise and sinusoidal) on the tuning curve parameters was assessed. Whatever the masker type, CAP tuning curve parameters were qualitatively and quantitatively similar to the ASSEP ones, with a similar inter-subject variability, but with a greater incidence of upward tip displacement. Whatever the procedure, sinusoidal maskers produced sharper tuning curves than narrow-band maskers. Although these differences are not likely to have significant implications for clinical work, from a fundamental point of view, their origin requires further investigations. The same amount of time was needed to record a CAP and an ASSEP 13-point tuning curve. The data further validate the ASSEP technique, which has the advantages of having a smaller tendency to produce upward tip shifts than the CAP technique. Moreover, being non invasive, ASSEP tuning curves can be easily repeated over time in the same subject for clinical and research purposes.