Hemisphere and stimulus differences as reflected in the cortical responses of newborn infants to speech stimuli.

Molfese, Dennis L.; Molfese, Victoria J.

doi:10.1037/0012-1649.15.5.505

Cited by 201 publications

(69 citation statements)

References 22 publications

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“…Phonological skills important for analyzing the sound patterns in spoken words are present at or near birth and others develop in early infancy. For example, young infants can discriminate between speech sounds of their native language environment and those of other languages (Eilers, 1977;Eilers, Wilson, & Moore, 1977;Eimas, Siqueland, Jusczyk, & Vigorito, 1971;Molfese & Molfese, 1979a, 1979b, 1980, 1985. This sensitivity changes in later infancy toward an increasing sensitivity to contrasts unique to the infant's language environment, a change that appears to facilitate language acquisition.…”

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confidence: 99%

Development of auditory event-related potentials in young children and relations to word-level reading abilities at age 8 years

Espy

Molfese

et al. 2004

Ann. of Dyslexia

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A relationship between brain responses at birth and later emerging language and reading skills have been shown, but questions remain whether changes in brain responses after birth continue to predict the mastery of language-related skills such as reading development. To determine whether developmental changes in the brain-based perceptual skills are systematically related to differences in wordlevel reading proficiency at age 8 years, brain event-related potentials (ERPs) to speech and nonspeech stimuli were recorded annually at the ages of 1 through 8 years in a sample of 109 typically developing children. Two measures of wordlevel reading (one that requires decoding of real words and one of pseudowords) were administered at age 8 years. Growth curve analysis, using the hierarchical linear models, related reading performance (average versus low) to the longitudinal maturation in the ERP waveform peak and latencies. Maturational changes (e.g., slope, acceleration, and cubic growth) in N1 amplitude from ages 1 to 4 were related to proficiency in decoding pseudoword stimuli only, with children who were less proficient in decoding pseudowords evidencing more steeply negative declines in amplitude with age, particularly at the frontal and parietal recording sites in response to both speech and nonspeech stimuli. In contrast, proficiency in decoding real words was related to developmental changes in N2 amplitudes from ages 4 to 8 only at the parietal recording site, and only in response to nonspeech stimuli. The early development of biologically based differences in the perception and processing of auditory information contributes to later group differences in reading proficiencies at school age.

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confidence: 99%

Development of auditory event-related potentials in young children and relations to word-level reading abilities at age 8 years

Espy

Molfese

et al. 2004

Ann. of Dyslexia

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“…In the auditory domain, studies have primarily contrasted the processing of speech versus nonspeech stimuli (often music). The typical pattem of lateralization reported in these studies is a right-ear/left-hemisphere advantage for speech and a left-ear/ right-hemisphere advantage for music (Bertoncini et al, 1989;Best, 1988;Molfese & Molfese, 1979). For example, when sounds were presented directly behind them, neonates were more likely to turn their heads to the right during presentation of speech and to the left during music, suggesting an early lefthemisphere bias for speech perception and right-hemisphere bias for music perception (Young & Gagnon, 1990).…”

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“…Researchers measuring infants' auditory-evoked responses report hemispheric dissociations in the processing of different components of synthesized speech (Molfese & Molfese, 1979. The pattern of visual field advantages in infants also suggests that multiple subsystems underlie object processing.…”

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Lateral asymmetries in infant melody perception.

Balaban

Anderson²,

Wisniewski³

1998

Developmental Psychology

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Two experiments investigated lateral asymmetries in infants' perception of contour-altered and contour-preserved melody changes. In the first study, 40 infants (8.5 months old) of right-handed parents were trained to respond to binaural melody changes with a head turn toward mechanized toy reinforcers. The subsequent test phase included monaural left-ear and right-ear presentations of the familiar melody and of a changed melody. Infants who heard a contour-altered change showed a left-ear advantage, whereas infants who heard a contour-preserved change showed a right-ear advantage. These effects were replicated with a different set of melodies in the second study. The pattern of lateralization for detection of melody changes in infants of right-handed parents resembles that previously found in right-handed adults and may reflect more general hemispheric processing differences in the early organization of auditory information processing.

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“…Some phonological skills that are important for analyzing the sound patterns in spoken words are present at or shortly after birth, whereas others develop in early infancy. Young infants discriminate between speech sounds that contain phonetic contrasts characteristic of their language environments, and they also appear to be sensitive to phonetic contrasts characteristic of other languages (Eilers, 1977;Eilers, Wilson, & Moore, 1977;Eimas, Siqueland, Jusczyk, & Vigorito, 1971;Molfese & Molfese, 1979, 1980, 1985. With further development, preschool children are able to segment spoken monosyllabic words into onsets and rimes and, thus, to play nursery rhyme games (Vellutino & Scanlon, 1987).…”

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confidence: 99%

Below-Average, Average, and Above-Average Readers Engage Different and Similar Brain Regions While Reading

et al. 2006

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Event-related potentials (ERPs) were recorded from 27 children (14 girls, 13 boys) who varied in their reading skill levels. Both behavior performance measures recorded during the ERP word classification task and the ERP responses themselves discriminated between children with above-average, average, and below-average reading skills. ERP amplitudes and peak latencies decreased as reading skills increased. Furthermore, hemisphere differences increased with higher reading skill levels. Sex differences were also related to ERP amplitude variations across the scalp. However, ERPs recorded from boys and girls did not differ as a function of differences in the children's reading levels.

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Hemisphere and stimulus differences as reflected in the cortical responses of newborn infants to speech stimuli.

Cited by 201 publications

References 22 publications

Development of auditory event-related potentials in young children and relations to word-level reading abilities at age 8 years

Development of auditory event-related potentials in young children and relations to word-level reading abilities at age 8 years

Lateral asymmetries in infant melody perception.

Below-Average, Average, and Above-Average Readers Engage Different and Similar Brain Regions While Reading

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