Treat it like any other behavioral problem in the workplace. I've found that most people who are negative in the workplace don't even know it. No one gives them the feedback, because they think it's part of their personality. They can't change their personality, but they can change their behavior. A Change is one of the biggest causes of negativity.
People always feel that their competence is coming into question, that they're losing control.
One of the crucial things is that companies must be really alert to how they implement change in the workplace. You have to have all that kind of stuff to build a positive workplace. Anything that a company can do to bring fun to the workplace is a great strategy. It takes all of these kinds of things together to create a positive work environment. I think it's an inverse relationship.