Title slide reads "Interrupting ongoing reinforcement can be used to evoke a mand". Video begins with two children sitting on the floor playing with some toys. A woman walks in and says "Hey guys. Let's watch TV, let's see whats on." The woman turns on the TV and a cartoon starts playing. The woman says "Cartoons are on!" She then turns the TV off and one of the children asks "Can we watch TV?". The other child says "Please?" and the woman says "Sure. You can watch TV". The woman turns the TV back on.