learning human 452 article 312 Humans 309 male 256 female 239 Learning 235 adult 205 human experiment 181 controlled study 135 Male 124 Female 116 physiology 109 Article 90 Adult 87 young adult 64 Young Adult 62 education 61 major clinical study 60 child 55 memory 54 nonhuman 54 attention 50 clinical article 49 language 43 skill 43 Animals 42 animal 42 questionnaire 40 teaching 40