That is achieved by a process called negative selection.

ECONOMIST: A thousand ills require a thousand cures

After controlling for self-selection bias, the impact of PBC on reliability shifted from negative to strongly positive.

FORBES: Magazine Article

The point is that a bowler like Harmison can have such an impact a positive or negative impact on his team that he will always be a tough one to discuss at the selection table.

BBC: Justin Langer column