background: aggression is a kind of behavior that causes damage or harm to others. the prevalence of aggression is 8–20% in 3–6 years old children. the present study aimed to assess the effect of training kindergarten teachers regarding reinforcement behavior therapy on preschoolers’ aggression. methods: in this cluster randomized control trial, 14 out of 35 kindergarten and preschool centers o...

objective: children with autism have sitting and on-task behavior problems in class. therefore, the effects of three alternative classroom-seating devices such as regular classroom chairs, therapy balls, and air cushions were examined on students’ classroom behavior. material and method: fifteen autistic students participated in this a-b-a-c multiple treatments, semi-experimental study. student...