Humans 70 Language Development human 70 language development 70 female 57 male 56 language 40 article 38 child 38 Female 37 infant 36 Male 35 human experiment 34 Infant 33 Language 31 Child 28 preschool child 26 Child, Preschool 24 Speech Perception 24 speech perception 24 learning 22 adult 19 Learning 18 physiology 18 linguistics 17 Linguistics 16 speech 16 Adult 14 controlled study 14 vocabulary 14