We thank Ms. Wolkenhauer, Ms. Llamas, and Mr. A. Koyama for help in data collection and analysis. This study was supported by NIH/NINDS grant 5 P50 NINDS NS22343-18.
ERPs differentiate syllable and nonphonetic sound processing in children and adults
Article first published online: 29 JUN 2005
Volume 42, Issue 4, pages 391–406, July 2005
How to Cite
Čeponienė, R., Alku, P., Westerfield, M., Torki, M. and Townsend, J. (2005), ERPs differentiate syllable and nonphonetic sound processing in children and adults. Psychophysiology, 42: 391–406. doi: 10.1111/j.1469-8986.2005.00305.x
- Issue published online: 29 JUN 2005
- Article first published online: 29 JUN 2005
- (Received September 13, 2004; Accepted March 21, 2005)
- Event-related brain potentials;
We examined maturation of speech-sound-related indices of auditory event-related brain potentials (ERPs). ERPs were elicited by syllables and nonphonetic correlates in children and adults. Compared with syllables, nonphonetic stimuli elicited larger N1 and P2 in adults and P1 in children. Because the nonphonetics were more perceptually salient, this N1 effect was consistent with known N1 sensitivity to sound onset features. Based on stimulus dependence and independent component structure, children's P1 appeared to contain overlapping P2-like activity. In both subject groups, syllables elicited larger N2/N4 peaks. This might reflect sound content feature processing, more extensive for speech than nonspeech sounds. Therefore, sound detection mechanisms (N1, P2) still develop whereas sound content processing (N2, N4) is largely mature during mid-childhood; in children and adults, speech sounds are processed more extensively than nonspeech sounds 200–400 ms poststimulus.