Common Neural Basis for Phoneme Processing in Infants and Adults

Dehaene‐Lambertz, Ghislaine; Gliga, Teodora

doi:10.1162/0898929042304714

Cited by 106 publications

(76 citation statements)

References 103 publications

(124 reference statements)

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“…phoneme presented similar functional properties to that described in adults (categorical perception, normalization and integration of facial cues), confirming a continuity between infant and adult speech computations (Dehaene-Lambertz & Gliga, 2004). Furthermore, we recorded two MMRs with two different topographies when either the gender of the speaker or the vowel spoken was incongruent with the previous visual information.…”

Section: Discussionsupporting

confidence: 79%

“…In infants, a similar response is observed but the polarity is usually, but not always, positive over the frontal lobe and negative over the posterior regions. Its latency is also delayed relative to adults, and occurs between 100 and 400 msec (see Dehaene-Lambertz & Gliga, 2004 for a review and a discussion about auditory MMR in infants). We inspected the time course of two-dimensional reconstructions of the difference between all congruent and incongruent trials across both contexts (main effect of congruency).…”

Section: Erp Analysesmentioning

confidence: 99%

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Hearing Faces: How the Infant Brain Matches the Face It Sees with the Speech It Hears

Bristow

Dehaene‐Lambertz

Mattout

et al. 2008

Journal of Cognitive Neuroscience

136

116

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Abstract& Speech is not a purely auditory signal. From around 2 months of age, infants are able to correctly match the vowel they hear with the appropriate articulating face. However, there is no behavioral evidence of integrated audiovisual perception until 4 months of age, at the earliest, when an illusory percept can be created by the fusion of the auditory stimulus and of the facial cues (McGurk effect). To understand how infants initially match the articulatory movements they see with the sounds they hear, we recorded high-density ERPs in response to auditory vowels that followed a congruent or incongruent silently articulating face in 10-week-old infants. In a first experiment, we determined that auditory-visual integration occurs during the early stages of perception as in adults. The mismatch response was similar in timing and in topography whether the preceding vowels were presented visually or aurally. In the second experiment, we studied audiovisual integration in the linguistic (vowel perception) and nonlinguistic (gender perception) domain. We observed a mismatch response for both types of change at similar latencies. Their topographies were significantly different demonstrating that cross-modal integration of these features is computed in parallel by two different networks. Indeed, brain source modeling revealed that phoneme and gender computations were lateralized toward the left and toward the right hemisphere, respectively, suggesting that each hemisphere possesses an early processing bias. We also observed repetition suppression in temporal regions and repetition enhancement in frontal regions. These results underscore how complex and structured is the human cortical organization which sustains communication from the first weeks of life on. &

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Section: Discussionsupporting

confidence: 79%

Section: Erp Analysesmentioning

confidence: 99%

Hearing Faces: How the Infant Brain Matches the Face It Sees with the Speech It Hears

Bristow

Dehaene‐Lambertz

Mattout

et al. 2008

Journal of Cognitive Neuroscience

136

116

View full text Add to dashboard Cite

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“…Strong hemispheric asymmetries in infancy are not unusual (24)(25)(26)(27)(28), and some researchers have even argued for a RH dominance in infancy caused by greater RH than LH cerebral blood flow (35). Changes in side of lateralization across development are also not unusual and are found for other domains such as some aspects of language processing (26,36). Further research is needed to understand the neuro-physiological basis of early hemispheric asymmetries and their development.…”

Section: Resultsmentioning

confidence: 99%

Categorical perception of color is lateralized to the right hemisphere in infants, but to the left hemisphere in adults

Franklin

Drivonikou

Bevis

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

176

149

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Both adults and infants are faster at discriminating between two colors from different categories than two colors from the same category, even when between-and within-category chromatic separation sizes are equated. For adults, this categorical perception (CP) is lateralized; the category effect is stronger for the right visual field (RVF)-left hemisphere (LH) than the left visual field (LVF)-right hemisphere (RH). Converging evidence suggests that the LH bias in color CP in adults is caused by the influence of lexical color codes in the LH. The current study investigates whether prelinguistic color CP is also lateralized to the LH by testing 4-to 6-month-old infants. A colored target was shown on a differently colored background, and time to initiate an eye movement to the target was measured. Target background pairs were either from the same or different categories, but with equal target-background chromatic separations. Infants were faster at initiating an eye movement to targets on different-category than same-category backgrounds, but only for targets in the LVF-RH. In contrast, adults showed a greater category effect when targets were presented to the RVF-LH. These results suggest that whereas color CP is stronger in the LH than RH in adults, prelinguistic CP in infants is lateralized to the RH. The findings suggest that language-driven CP in adults may not build on prelinguistic CP, but that language instead imposes its categories on a LH that is not categorically prepartitioned.language and thought ͉ nature/nurture ͉ lateralization ͉ perceptual development C ategorical perception (CP) of color is shown when two colors that belong to different color categories (between-category judgments) are discriminated faster, or more accurately, than two colors belonging to the same color category (within-category judgments), even when between-and within-category chromatic separation sizes are equated (1). ʈ This effect is found in adults (2-5), children and toddlers (6, 7), and infants (8-10). The role of language in the effect has been extensively debated (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). For example, some have advanced the hypothesis that the on-line use of language is the origin of the effect: comparing stimulus labels aids discrimination for between-category pairs and/or hinders discrimination for within-category pairs. In support of this hypothesis, for adult participants, CP is found only if the category boundary is marked in the participant's language (3, 12, 13), and verbal interference eliminates CP, but visual interference does not (4,5,13,14). It has, however, been found that color CP occurs prelinguistically in toddlers and infants, who have no color language (6,(8)(9)(10).A recent set of studies looking at hemispheric asymmetries in color CP has added a new perspective on the debate. Gilbert et al. (14), using a visual search task, found that the time to detect a colored target among differently colored distractors was faster when target and distractors were from different categories (e.g., bl...

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“…As discussed above, cumulative data from electrophysiological and imaging studies with young infants suggest that the two hemispheres are not symmetrical in processing speech and other auditory stimuli from early in infancy (Homae et al, 2006;Dehaene-Lambertz & Gliga, 2004;Peña et al, 2003;Dehaene-Lambertz et al, 2002;Dehaene-Lambertz, 2000;Dehaene-Lambertz & Baillet, 1998;Dehaene-Lambertz & Dehaene, 1994). Infants at this young age are not likely to have learned much about the specific characteristics of their native language segments although they may have already learned some prosodic properties.…”

Section: Discussionmentioning

confidence: 99%

Development of Hemispheric Specialization for Lexical Pitch–Accent in Japanese Infants

Satō

Sogabe

Mazuka

2010

Journal of Cognitive Neuroscience

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Common Neural Basis for Phoneme Processing in Infants and Adults

Cited by 106 publications

References 103 publications

Hearing Faces: How the Infant Brain Matches the Face It Sees with the Speech It Hears

Hearing Faces: How the Infant Brain Matches the Face It Sees with the Speech It Hears

Categorical perception of color is lateralized to the right hemisphere in infants, but to the left hemisphere in adults

Development of Hemispheric Specialization for Lexical Pitch–Accent in Japanese Infants

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