Parentese Elicits Infant Speech‐Like Vocalizations in Typically Developing and Autistic Infants

Infancy, Год журнала: 2025, Номер 30(3)

Опубликована: Май 1, 2025

ABSTRACT Caregivers across many cultures modify their speech when interacting with infants or young children. This type of speech, commonly known as “parentese”, is characterized by greater pitch variations, longer duration, and louder volume compared to directed adults. Parentese has been found facilitate language learning. It proposed that parentese may benefit early development because its exaggerated prosody encourages interact caregivers. We tested this hypothesis investigating if temporally elicits infant speech‐like vocalization in typically developing (TD) autistic using sequential analysis. caregiver‐child vocal contingencies coded from 847 days‐long recordings 103 TD 44 a confirmed diagnosis autism spectrum disorder (ASD) at 3 years. Findings revealed were more likely produce following an adult utterance them register. Additionally, the strength association between register did not differ diagnostic groups. These findings support notion learning via encouraging respond conversation partner.

Язык: Английский

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Cortical tracking of visual rhythmic speech by 5‐ and 8‐month‐old infants: Individual differences in phase angle relate to language outcomes up to 2 years

Developmental Science, Год журнала: 2024, Номер 27(4)

Опубликована: Март 14, 2024

Abstract It is known that the rhythms of speech are visible on face, accurately mirroring changes in vocal tract. These low‐frequency visual temporal movements tightly correlated with output, and both (e.g., mouth motion) acoustic amplitude envelope entrain neural oscillations. Low‐frequency information (‘visual prosody’) from behavioural studies to be perceived by infants, but oscillatory currently lacking. Here we measure cortical tracking 5‐ 8‐month‐old infants using a rhythmic paradigm (repetition syllable ‘ta’ at 2 Hz). Eye‐tracking data were collected simultaneously EEG, enabling computation phase angle during visual‐only presentation. Significantly higher power stimulus frequency indicated occurred across ages. Further, individual differences preferred related subsequent measures language acquisition. The difference between same presented as auditory‐visual 6‐ 9‐months was also examined. suggest early acquisition may entrainment input infancy. Research Highlights Infant predicts outcomes. Significant present 5 8 months. Phase months predicted greater receptive productive vocabulary 24

Язык: Английский

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Early language experience modulates the tradeoff between acoustic-temporal and lexico-semantic cortical tracking of speech

iScience, Год журнала: 2024, Номер 27(7), С. 110247 - 110247

Опубликована: Июнь 13, 2024

Cortical tracking of speech is relevant for the development perception skills. However, no study to date has explored whether and how cortical shaped by accumulated language experience, central question this study. In 35 bilingual children (6-year-old) with considerably bigger experience in one language, we collected electroencephalography data while they listened continuous their two languages. was assessed at acoustic-temporal lexico-semantic levels. Children showed more robust least experienced sensitive semantic information most language. Additionally, only specifically linked phonological abilities, vocabulary knowledge. Our results indicate that linguistic a maturational factor different levels during early acquisition.

Язык: Английский

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Sing to me, baby: Infants show neural tracking and rhythmic movements to live and dynamic maternal singing

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2023, Номер unknown

Опубликована: Фев. 28, 2023

Abstract Infant-directed singing has unique acoustic characteristics that may allow even very young infants to respond the rhythms carried through caregiver’s voice. The goal of this study was examine neural and movement responses live dynamic maternal in 7-month-old their relation linguistic development. In total, 60 mother-infant dyads were observed during two conditions (playsong lullaby). Study 1 ( n = 30), we measured infant EEG used an encoding approach utilizing ridge regressions measure tracking. 2 40), coded rhythmic movements. both studies, assessed children’s vocabulary when they 20 months old. 1, found above-threshold tracking singing, with superior lullabies than playsongs. We also features infant-directed modulated 2, showed more playsongs lullabies. Importantly, coordination (Study 1) 2) positively related infants’ expressive at months. These results highlight importance brain musical presentations, potentially as a function variability.

Язык: Английский

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Real-time monitoring of infant theta power during naturalistic social experiences

Developmental Cognitive Neuroscience, Год журнала: 2023, Номер 63, С. 101300 - 101300

Опубликована: Сен. 21, 2023

Infant-directed speech and direct gaze are important social cues that shape infant's attention to their parents. Traditional methods for probing effect on infant involve a small number of pre-selected screen-based stimuli, which do not capture the complexity real-world interactions. Here, we used neuroadaptive Bayesian Optimization (NBO) search large 'space' different naturalistic experiences systematically varied in visual (gaze averted) auditory properties (infant directed nonvocal sounds). We measured oscillatory brain responses (relative theta power) during episodes 57 typically developing 6- 12-month-old infants. Relative power was as input NBO algorithm identify context maximally elicited each individual infant. Results showed infants were heterogeneous stimulus maximal with no overall stronger or infant-directed speech; however, differences towards averted related interpersonal skills greater likelihood preferring observed whose parents more positive affect. Our work indicates may be fruitful method role distinct eliciting contexts at level.

Язык: Английский

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Ten-month-old infants’ neural tracking of naturalistic speech is not facilitated by the speaker’s eye gaze

Developmental Cognitive Neuroscience, Год журнала: 2023, Номер 64, С. 101297 - 101297

Опубликована: Сен. 29, 2023

Eye gaze is a powerful ostensive cue in infant-caregiver interactions, with demonstrable effects on language acquisition. While the link between following and later vocabulary well-established, of eye other aspects language, such as speech processing, are less clear. In this EEG study, we examined speaker's ten-month-old infants' neural tracking naturalistic audiovisual speech, marker for successful processing. Infants watched videos speaker telling stories, addressing infant direct or averted gaze. We assessed speech-brain coherence at stress (1-1.75 Hz) syllable (2.5-3.5 rates, tested differences attention by comparing looking times theta power two conditions, investigated whether predicts vocabulary. Our results showed that brains tracked rhythm both rate predicted However, did not significantly differ conditions infants show greater to Overall, our suggest significant ten months, related development, but modulated

Язык: Английский

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Phonological acquisition depends on the timing of speech sounds: Deconvolution EEG modeling across the first five years

Science Advances, Год журнала: 2023, Номер 9(44)

Опубликована: Ноя. 1, 2023

The late development of fast brain activity in infancy restricts initial processing abilities to slow information. Nevertheless, infants acquire the short-lived speech sounds their native language during first year life. Here, we trace early buildup infant phoneme inventory with naturalistic electroencephalogram. We apply recent method deconvolution modeling capture emergence feature-based representation that is known govern mature brain. Our cross-sectional analysis uncovers a gradual developmental increase neural responses phonemes. Critically, appear those features extend over longer time intervals-thus meeting infants' abilities. Shorter-lived are added stepwise, shortest acquired last. study shows ontogenetic acceleration electrophysiology shapes acquisition by determining duration units.

Язык: Английский

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The developmental trajectory of functional excitation‐inhibition balance relates to language abilities in autistic and allistic children

Autism Research, Год журнала: 2023, Номер 16(9), С. 1681 - 1692

Опубликована: Июль 26, 2023

Abstract Autism is a neurodevelopmental condition that has been related to an overall imbalance between the brain's excitatory (E) and inhibitory (I) systems. Such EI can lead structural functional cortical deviances thus alter information processing in brain, ultimately giving rise autism traits. However, developmental trajectory of imbalances across childhood adolescence not investigated yet. Therefore, its relationship traits well understood. In present study, we determined measure balance (f‐EIB) from resting‐state electrophysiological recordings for final sample 92 autistic children 6 17 years age 100 allistic (i.e., non‐autistic) matched by age, sex, nonverbal‐IQ. We f‐EIB behavioral assessments as language ability. Our results revealed differential trajectories compared children. Importantly, values individual particular, elevated excitability late early was linked decreased listening comprehension. findings provide evidence against general when correcting non‐verbal IQ. Instead, show shares variance with trait development at specific range. This consistent proposal brain activity key substrate

Язык: Английский

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Theta power relates to infant object encoding in naturalistic mother‐infant interactions

Child Development, Год журнала: 2023, Номер 95(2), С. 530 - 543

Опубликована: Сен. 15, 2023

Abstract This study investigates infants' neural and behavioral responses to maternal ostensive signals during naturalistic mother‐infant interactions their effects on object encoding. Mothers familiarized 9‐ 10‐month‐olds ( N = 35, 17 females, mainly White, data collection: 2018–2019) with objects or without mutual gaze, infant‐directed speech, calling the infant's name. Ostensive focused attention mothers. Infant theta activity synchronized alpha desynchronized compared a nonsocial resting phase (Cohen' d : 0.49–0.75). Yet, amplitudes were unrelated signals. did not facilitate However, higher infant power encoding predicted better subsequent recognition. Results strengthen role of theta‐band for early learning processes.

Язык: Английский

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Contingency and synchrony: interactional pathways towards attentional control and intentional communication

Опубликована: Фев. 22, 2024

In this article we examine how contingency and synchrony during infant-caregiver interaction helps children to learn pay attention objects; this, in turn, affects their ability direct caregivers’ attention, track communicative intentions others. First, present evidence that, early life, child-caregiver interactions are asymmetric. Caregivers dynamically contingently adapt child more than the other way around, providing higher-order semantic contextual cues episodes which facilitate development of specialised integrated attentional brain networks infant brain. Then, describe social also facilitates child’s predictive models; and, through goal-directed behaviour. Finally, discuss behaviour can drive children's voluntarily; paves for intentional communication.

Язык: Английский

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