reward 152 human 136 male 102 Humans 94 Reward 93 adult 92 female 91 article 72 controlled study 57 Article 53 Male 50 Female 47 human experiment 47 decision making 43 physiology 40 motivation 36 Adult 34 nonhuman 34 young adult 31 animal experiment 28 Motivation 27 Young Adult 26 nuclear magnetic resonance imaging 22 learning 21 Animals 20 Magnetic Resonance Imaging 20 animal 20 diagnostic imaging 20 functional magnetic resonance imaging 20 psychology 19