language development human 118 Humans 107 female 96 male 93 Language Development 70 Female 64 Male 61 child 61 article 59 human experiment 54 language 51 preschool child 46 Child 44 Child, Preschool 43 infant 41 Language 39 Infant 36 adult 34 speech perception 31 Child Language 30 Speech Perception 30 learning 30 physiology 29 controlled study 28 speech 26 vocabulary 26 Learning 24 Adult 22 linguistics 21