All that most people know about Pollyanna is that calling someone that name is not a good thing. It is an effective way to discourage someone from undertaking something overly optimistic. But few people know the full story.
Positive, in the world of animal behavior, means adding something. Reinforcement means making something more likely to occur. So, "positive reinforcement" just means adding something to the equation to encourage that a behavior will happen again.
I can assure ABC that former Pan Am'ers will be watching their new television series en masse in hopes that the writers will be able to capture even a little bit of the spirit of glamour and adventure that our company represented.