 Yes, all right variable interval. It's a schedule of reinforcement. It's variable. It's based on intervals I mean, come on folks. This science is really cool. It describes itself the titles make sense and into themselves You don't even I was gonna say you don't need me, but yes, you do you really need us You can't function without us. Of course, we're not variable intervals I'm so off topic, but it doesn't matter. You know why because you'll listen Either way. I'm so anyway variable interval. Here we go So the first response after a given amount of time is going to be reinforced But that given amount of time is an average right the first response after a certain amount of time or after an average amount of time has passed will be reinforced so So the rat pressing the lever, right? So they press the lever and the first response is going to be reinforced after say three minutes on average So you might reinforce after 30 seconds might reinforce after six minutes You're at me might reinforce after 25 seconds or a minute or two minutes or three minutes or seven minutes or any that stuff But on average you're gonna reinforce the first response after the three-minute period of V I three It produces an extremely strong steady rate of responding. It's flipping awesome. Take a look at that thing back there on the wall behind me That gives you an example. It's a one of the basic schedules of reinforcement. It's always to it