Autism. Time Out has the weighted mean of 2.40, followed by Response Cost with weighted mean of 2.36 and followed by Tangible Rewards with weighted mean of 2.14. Autism as defined in many books is a severe learning disorder that is characterized by disturbances in rate of educational development, ability to relate to the environment, mobility and perception, speech, and language. They lack of representational symbolic behaviour that precedes language, thus time out also known as isolation is effective to such children. Behavior modification strategies with low level of usability to Children with Autism include Reprimand, Negative Reinforcer, and Physical Punishment with weighted means of 1.41, 1.44, and 1.45, respectively. Teachers knew that
