 independent group contingency. It's a group contingency, so meaning that you got a large group of people that were applying this contingency or making this contingency available to. But it's independent, meaning it's available to each individual in the group, right? So, and only the members that perform the behavior, the desired behavior, will earn the reinforcer. I like to call it the nina-nina-nina-nina-nina-nina group contingency. Why? Because the kids that get reinforced for engaging in the appropriate behavior look at all the kids that didn't and go nina-nina-nina-nina-nina-nina-nina. I get extra recess. I get extra recess. See how this works, right? So, I don't have any better examples for you than that, other than, I actually have lots of good examples, but none of them are appropriate for public consumption. So, independent group contingency has to do with the independent individuals that earn the reinforcers in the group. It does, not everyone will get it automatically, right? So, it's only the people that perform the appropriate response in the group will earn the reinforcers, but the whole group has the chance to do it.