Well, what a synchronicity ... I caught myself talking to myself just last night, and remarkably as they suggest, while preparing a meal in the kitchen. So it's not a symptom of, or 'mild' hebephrenia, it's actually a cognitive aid ... It does seem to remove the 'background noise' of competing thoughts, especially when in the midst of a task in which it helps to be 'singly minded' as their experiment indicates measurably here.