We see what we expect to see. For example, If we 're interested in a certain type of car, "suddenly" we see many more of these cars than before. This bias confirms the correctness of our interest, hence it 's called confirmation bias. In itself this isn 't a problem, in looking through our “pink glasses" we see our version of reality confirmed more firmly than it actually is. It may help us to feel confident about ourselves and our choices. However, also journalists and (other) academics (professionals and scientists) are only human. Things can go wrong there.