It doesn't really matter what the CDC uses to represent ADHD. This is not the CDC, it's not a medical association, it's not a waiting-room brochure for concerned parents of hyperactive children. It's an encyclopedia. Whether or not the image is considered appropriate by the CDC makes absolutely no bearing on whether or not it's suitable for an encyclopedia. Organizations are not infallible - I trust the CDC to know the symptoms, treatment, and progression of ADHD. I do not trust them to know how to paint a room, dress a hyperactive child, or illustrate an encyclopedia.