That is a related but different phenomenon. What you're looking for is called "self-serving bias." https://secure.wikimedia.org/wikipedia/en/wiki/Self-serving_... The dunning-kruger effect is much more subtle than that, take another look at the wiki article on it.

Also related, the actor-observer bias, which describes the opposite effect, and has had more research done on it. This is a common problem in psychology, humans are so full of contradiction.

https://secure.wikimedia.org/wikipedia/en/wiki/Actor%E2%80%9...