 We've got more classical conditioning stuff for you here. So now we're going to look at, let's look at delay conditioning, but you turn on the unconditional stimulus, the US. You turn it on. And as it's going, before you turn it off, you turn on the CS. So trace conditioning. What do you do? We're going to turn the US, I'm going to show you over here. We're going to turn the US on, turn it off, and then for about a half a second, interstimulus interval. Then we're going to turn the CS on and then turn it on. The last one is backward conditioning, which it is simply about presenting the CS before the US, I think. CS, US, CS, US, CS, US, CS, US. I think I've gotten all of these backwards possibly. Hold on. Uh-oh. CS predicts the onset of the US. The US predicts the onset of the CS. The secrets. It's OK to lift things up. Yes. So hold on, I'm going to double check myself here. It's easier just to find this trace because I'm in the T's. No, I'm not, but I'll get there. Trace conditioning. I think that was page 74, I believe, because I remember this. And ladies and gentlemen, there is more than one textbook out there for behavior analysis. This is a good one. I'm not going to tell you what it is, but you can look at it again because I don't advertise for this company. So the US slightly after the start of the CS, I did get all this backwards. We're going to rerecord it. Shit. All right.