human 7 infant speech article 6 Humans 5 female 5 human experiment 5 phonetics 5 Phonetics 4 Speech Perception 4 child 4 language development 4 male 4 speech perception 4 Infant 3 Language Development 3 Speech 3 clinical article 3 consonant 3 controlled study 3 phoneme 3 Female 2 Learning 2 Male 2 learning 2 newborn 2 vowel 2 Amodal phonology 1 Article 1 Attention 1