 Alright, here we are with fixed time schedule over enforcement, which is the delivery of non-contingent stimuli over the time or interval that remains the same on the delivery of said behavior. So the idea being the kid has a hard time in class, let's say we know he throws his desk for attention and he's going to just every 30 seconds or every minute he's going to get attention from the teacher. And it doesn't matter what behavior he's necessarily doing, as long as it's not the behavior of destroying his desk. Ta-da! And I'm getting apparently non-contingently reinforced every 10 seconds. I like chocolate. We'll let him sit there for four more. This is tasty. Now, contingent reinforcement fixed time schedule of 10 FT10S. That's all it was.