The earliest self-observing function probably operates only in conjunction with self-criticism. Direct observation of children would presumably show they are incapable of observing thoughts and feelings without labeling them good or bad. Introspection in the broadest sense would appear to go beyond the conception of 'mature' or 'integrative' self-regulation described by Jacobson, Kramer, and others, and beyond the purely cognitive model of internal observation implied in nineteenth century views. It would appear to include the internalization by the psychic apparatus of regulations performed by environmental objects for the purposes of regulation from within, with some of these internalizations remaining as 'inner voices'. The superego most obviously, but not exclusively, has this character.