Applied behavior analysis adult 2 behavior modification 2 human 2 Acceptance and commitment training 1 Adult 1 Article 1 Autism spectrum disorders 1 Basic–applied continuum 1 Biomedical model 1 COVID-19 1 Challenging behaviors 1 Child 1 Child, Preschool 1 Developmental Disabilities 1 Developmental delay 1 Experimental analysis of behavior 1 Female 1 Health Education 1 Humans 1 Internal validity 1 Male 1 Overweight 1 Parent training 1 Parent-Child Relations 1 Parents 1 Physical activity 1 Scientific consequences 1 Self-Injurious Behavior 1 Self-injury 1