Victoria Leong|Marina Kalashnikova|Denis Burnham|Usha Goswami
The Temporal Modulation Structure of Infant-Directed Speech
Centre for Cognitive Neuroscience|University of Cambridge|Western Sydney University|Western Sydney University|Centre for Cognitive Neuroscience|University of Cambridge
temporal modulation structure adultdirected speech ads thought encoded neuronal oscillations auditory cortex fluctuate different temporal rates oscillatory activity thought phasealign amplitude modulations speech corresponding rates thereby supporting parsing signal linguistically relevant units temporal modulation structure infantdirected speech ids unexplored compare amplitude modulation structure ids recorded mothers speaking three occasions 7 9 11monthold infants mothers speaking ads analysis modulation spectrum case revealed modulation energy theta band significantly greater ads ids whereas delta band modulation energy significantly greater ids ads furthermore phase alignment delta thetaband ams stronger ids compared ads remained case ids ads ratenormalized control differences speech rate data indicate stronger rhythmic synchronization acoustic temporal regularity ids compared ads structural acoustic differences may important early language learning