Sensory Motor Dysfunction, OT , behaviors and ABA

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A child with autism ; 11 years old has behaviors and teachers think they are of a sensory nature. The child is also non verbal and uses PECS. There are 2 opinions; dealing with the behaviors using ABA strategies( to decrease the behavior) and giving sensory -type reinforcers like time to play with water,etc. Another opinion is to treat the "sensory motor dysfunction"by isolated ,private, occupatiional therapy(sensory integration) outside the school to get the "behaviors" under control". My questions are will sensory motor integration"treat" the behaviors? Anyone had experience with this type of therapy...iWill the OT be able to control the behaviors in the first place? I am wondering what the mom will choose? Any advice?