 All right, we're back with fixed interval schedule of reinforcement. So fixed, permanent, done. It's not moving, it's not changing, it's not wavering, it's not doing anything. It's fixed. It wasn't ever broken, don't go there. Next is interval, all about the time. We're not talking seconds, we're not... Well, we could be talking seconds, but think time, okay? So you have fixed time. Not the time was ever broken, you just have fixed time, which means it's going to stay at that certain duration of time. Let's go with one minute, for example. So you have a fixed interval of one minute. Looks something like this. All right, so reinforcement will be delivered on the desired behavior after said minute. There you go. So the problem is... Interesting thing about fixed interval schedules of reinforcement is it kind of looks like this. You get this nice little... Also known as a fixed interval scallop in responding. Like, yeah. Yeah. Yeah. All right. There you go. Anytime.