human 9 Humans 7 Male 6 male 6 psychology 5 Female 4 female 4 Child, Preschool 3 Extinction, Psychological 3 Middle Aged 3 Reinforcement, Psychology 3 adult 3 article 3 middle aged 3 physiology 3 preschool child 3 Adult 2 Animals 2 Behavior Therapy 2 Conditioning, Operant 2 Reinforcement Schedule 2 animal 2 autism 2 autism spectrum disorder 2 behavior therapy 2 behavioral skills training 2 language 2 operant conditioning 2 procedures 2 reinforcement (psychology) 2