We started implementing an NACD program with our son who has Down syndrome 6 months ago and have already seen great improvements. At age 3 he was only able to say 1 and 2 word sentences, since we began the processing activities he is now consistently speaking in 3, 4, and sometimes 5 word sentences. His behavior has also improved, we can see him making better choices and really thinking about what he is doing, rather than some of the impulsive behavior we were seeing before.