On my team, the credit goes to whoever talks the loudest about their own work, while the quiet ones who actually carry things get passed over. I let it happen; I rewarded the noise. And now I can see the steady people learning that keeping their heads down and doing good work doesn't pay.
More people experience this than they realize.
The loudest self-promoters get the credit while your steady, quiet workers go unseen.
If this sounds familiar, the Library can help you find the bigger picture.