I'm doing my part as a Nielsen family! Yay!
Like many surveys, this one entices you to participate with cash incentives. That's all well and good, but I would think that the ability to shape future entertainment decisions would be motivation enough.
Although there is some bias already at work. By knowing that my viewing habits will be recorded this week, I can't help but decide to skip over bad shows/movies and watch all the good shows on my DVR. Not that I need to rewatch the last episode of Game of Thrones, but I might be tempted to go ahead and do so over the weekend.
It's really hard to be without bias here. Granted, I'm sure that everyone else with a diary isn't being without bias.