So in your view, what would be an ideal age in which to carefully and professionally use the ABA methodology? You mention his starting at the age of 5, but also

So in your view, what would be an ideal age in which to carefully and professionally use the ABA methodology? You mention his starting at the age of 5, but also that this produced an outcome that was rare. Thus, would an even younger age be more correct? I don't know enough about ABA to critique it too much, and i'm honestly curious about these nuances. Thanks for the response above despite my late reply.