when you hear a bump in the dark its one thing when you see the bad guy up close its a different story . At that point i would guess most will give themselves every advantage .
When you shoot start every string by wiping off the safety . Do it every time and you won't need to worry about it .
I suspect that under extreme stress,and of course the time constraints of having to react in a matter of seconds,or fractions of seconds,Im not going to remember to give my self any extra advantage. Unless its something Ive practiced and practiced until Ive built up muscle memory, and do it automatically,Its a good bet I'm just not going to do it. Since I have shot by keeping my finger next the trigger until I actually fire,then keeping my finger on the trigger for every shot until I'm ready to stop firing,I think that's what I would end up doing.
Im pretty much betting on the fact that,should I be faced with having to use a gun in self defense,the only thing that Im going to be able to "think" about is,"I have to shoot" and the better come automatically or I'm pretty much done for. I guess with enough practice even that could be automatic,but I suspect that could be a very dangerous thing,leading to situation where you identify the threat,without thinking draw your weapon flip off the safety,and put three shots center of mass,only to realize that at best you just shot your girl friends cat (don't get me wrong,I like cats,in fact I own a cat and am rarely tempted to shoot him),at worst you just shot HER getting up to get a drink of water. It just doesn't seem like something I would want to get so hardwired into me that I could just "switch off" and let it happen without thinking.