You have a link to an "article on constructive development", which you repeat no fewer than six times to encourage readers to go and read it.

However, the thing at the far end of the link is not an article on constructive development. It is an article about (1) two ways of responding to one's own misdeeds and (2) a notation for describing stages in the transition between two modes of thinking. (The notation is called "subject-object notation" but appears to have nothing specifically to do with the subject/object distinction. This doesn't seem to me like a good sign that the author is thinking clearly about things.)

There is a link from there to a summary of constructive-developmental theory by Peter Pruyn. It seems ... OK, I guess. I'm rather put off by the patronizing mealy-mouthedness with which the author disclaims the very idea that the later stages might be thought "better" -- in the same article in which he says that later stages indicate their capacity to cope with difficult situations, suggests that those at earlier stages are unfit for senior roles at work, calls the later stages "higher levels of consciousness", and of course classifies them as developmental stages which on its own pretty much gives the game away.

Still, congratulations on reaching level 4. (Though it seems to me there's something rather inappropriate about saying that.)