Originally Posted by MysticSonic as interpreted by schrödinger's cat
Some types seem to think negatively about themselves because it means they don't have to take responsibility for what they've done. "I'm such an idiot, what else would you expect of me?" If you simply declare you totally suck at doing something, you've effectively excused yourself from doing a proper job. You've got rid of the responsibility.
Of course you could try to do your best, and you could try to learn things and develop your skills. But you pretend it's not important, or that it would be useless anyway. Why? Because it would mean having to take on responsibility.
People who think that way probably do it because they hate being criticized or put down by others. Because of that, I think that the question is whether or not that way of thinking is dependent upon type.
Eh, sorry that I've made the question more complicated instead of making it simpler. From what I've seen and heard of, I'd say that introverted judging types are more likely than other types to think like I said.
And, I don't think it leads towards self-centered thinking, but rather towards having goals that are only about yourself.