 And this time we have the term adjunctive behavior. Adjunctive behavior is a schedule-induced effect that occurs oftentimes in the operant chamber, but its behavior that occurs is a collateral effect of the schedule of periodic reinforcement. Specifically, it is the time-filling behavior that happens in between the reinforcing moments and is not really the behavior that you're intending to reinforce. An example would be the stuff you do when you don't have to do anything. That is often adjunctive behavior, although not necessarily. In an operant chamber, a rat will often wander around and seek things out in the operant chamber, and they'll get accidentally reinforced for some weird behavior, and that weird behavior ends up sticking, right, and then they will repeat that, even though we were not intending to reinforce the animal for that particular act. Specifically, the acts in those types of chambers are just lever-pressing, but sometimes the rat will end up being reinforced for turning in circles, climbing a wall, rolling on its back, whatever the case may be.