There's a lot of depth in each of these that we're not going to go into, and this will really just provide you a much more indepth over view of what we're talking about. So we're going to start with the yurk dadsen curve. The yurk sdadsen curve is a exploration of how humans perform under pressure, how individuals perform under pressure. And what it looks at is the relationship of how performance varies as we increase the stress and pressure in a particular situation. Will you have? On the y axis, rs performance. So higher up values on the y axis, you'r performing a task better, and lower values, youre performing it worse. Along the x axis, you have stress. So the farther along the x axis, the more stress and pressure youare under, and the closer to the origin, the less stressful of a situation it is. And what you can see here in the curve is that we have whatlooks like a sort of bell shaped curve. Now, sometimes this looks like an inverse relationship, and sometimes this looks like a bell shaped curve. But either way that you see it, what you have is, in the centre, an optimal zone, and wer ging to highliht that here for a second, in blue. And so in the optimal zone, you are doing your best. Your performance is absolt maximized. Now, it's important to note that this does not occur at zero stress, right? It occurs somewhere in the middle of the amount of stress that we're able to handle. And really you can conceptually break this curve down into a sort of three large zones, right? So in the middle is this optimal zone. Things are going great. You'r performing really at the high light of your ability. To the left, that is sort of a floppy zone, right? You're not really stimulated enough. You're a little bit flat on your feet. You're just not quite awake enough to really perform, cause the stress of the situation isn't really enough to push you. And on the right, you're over stressed, right? You're frazzled a little bit, and you're really being affected by the stress of the situation to the point where your performance is ing. So we can sort of look at this as three zones, an optimal zone, an overly left shifted zone and an overly right shifted zone. And in fact, that's the terminology that we're going to use about this right? So were in the middle where optimal. If we're too far stressed, we're right shifted. And if we're awaiy too far stressed, then we're left, excuse me. If we're weight not stressed enough, were too much on the left side of this curve, then we're left shifted. The other thing that terminology gets us is the ability to think about actions as whether they right shift us or left shift us right. So the most common way we're goingtobe applying this in emergency situations is that we're over stressed, were over pressurized. We're in a situation where the real of what's going on around us is affecting us. Maybe there's a lot of screaming, there's a lot of blood. It's a really high stake scenario, and we're under a ton of stress. And what that means is that we're right shifted compared to what we want to be so the actions that we take to mitigate the effects of stress and pressure on performance are therefore called left shifting actions. I just want to say that again, because that's really critical terminology, right? If we're too far stressed, we are right shifted. Anything we do to improve our ability to perform under pressure is left shifting us back into centre. Now, obviously, the opposite terms would be true also, if we are under stressed or under em stimulated, then we are our left shifted, and the actions we're going to take to really reve ourselves up and get back to that optimal zone are called right shifting actions. Ok, so you might look at this curve and say, well, why is it shaped exactly like that? What are the tails like? How tall is the middle? How wide is that optimal zone?