 Overall response, ready? All right, we're going to record, we've got one minute. We're going to do exactly one minute. So Brad's going to turn that camera off at one minute no matter what I'm done, no matter if I'm done with the definition or not. Your job is to count how many times I, I don't know, speak how many times, how many words I use over that one minute period. And then you take that and you go 53 words per minute or 500 words per minute or 1,000 words per minute. I suppose I can get talking really fast. You can probably have a really hard time counting this which gets you into measurement buys, measurement error and observer error and all sorts of issues, all those other things. That wasn't a word, so you don't get to count that one. Anyway, so the overall response rate, just define a period of time, let's say now, one minute. Count how many words that I've done in that minute, how many behaviors, whatever it is. And that will give you the overall response rate. If you break it down into small little sections, maybe a 10 second period to be able to get local response rate, which you can have to watch a video to find out about that, but that's just a whole different issue. Response rates are very useful. In fact, it was one of the things that Skinner discovered, popularized, whatever it may be.