 K, D, R, L, which sounds really funny, dirtle. All right, welcome to applied behavior analysis. Anyway, differential reinforcement of low rates, which means, think of it this way, you're gonna do differential reinforcements. So you have that terminal or approximate behavior that you're gonna get to reinforce, and then the procedure at the end, you have L, H, A, I, O, all that. So we're focused on D, R, L, or L for those who are watching and dyslexic. Anyway, so what we wanna do is, for instance, I'm gonna give you an example of differential reinforcement of low rates. We're gonna try to decrease things. Bob has a great time at parties in his frat house, and ends up drinking a keg every Friday. Possibly a little too much alcohol consumption in one evening, a whole keg by yourself. Good luck having a liver. Anyway, the idea of being, beer is an okay thing. You don't wanna get rid of that. You're not gonna completely remove responding to a zero rate, so we're gonna teach Bob to lower his rate of responding or lower his drinking. See, I, R, T are in a response time. Another great example is done in the classroom. You have all the kids that are like, hi, hi, teacher, I have a question. Teacher, I have a question. I have to go to the bathroom. What's the meaning of life? What's all this stuff? What's your philosophy talking about? When did you teach? Did you get married? Were you sick the other night? Way too many bloody questions to the point that class can't continue. DRL, you're gonna reinforce lower and lower rates of responding per chunk of time.