This is a concept in
psychology that sheds a lot of light on how we see ourselves.
We tend to see other people as having
stable, established
personalities, while we see ourselves as constantly changing and/or not as consistent.
Say we are asked to explain why someone did a given thing. If it is someone else, we are more likely to say that they did it because it is an aspect of their personality, ie something they always do. But if it is something we ourselves did, we are more likely to give reasons that stem from the context.
This explains some people's incredulity at being considered a "good noder." It's not false modesty. It is just that while we see their good nodes as examples of their intrinsic ability, they see the nodes as reactions to situations.