Right, the stuttering is not a behavior. And it's not a problem for society. It's an individual issue that needs therapy or at least patience: In a courtroom, accommodations can be used so that things are recorded properly. Psychologist deal with behaviors that can be a problem for society. If someone chop a tree, that's a behavior.. but not a job for a psychologist. If someone is bi polar and it gets out of control, they could directly harm someone nearest to them... a psychologist/psychiatrist is called for that before it happens because we know the patterns.