One of the clearest divides between personality types is illustrated by how they react to being yelled at. People always react instinctively in this situation; when someone yells at you, you are definitely in the moment.
One of the telling differences here is not just between alphas and betas, but between alphas and guys who think of themselves as alphas. Guys who like to think of themselves as alphas are generally just narcissistic personalities, and narcissists inevitably become angry when criticized. When actually yelled at, they become filled with rage and yell back.
This might on the surface appear to be alpha behavior, but in fact a real alpha would be so sure of himself that he would be unaffected by someone else's criticism -- or histrionics. He might laugh, as most adults would at a five year old throwing a tantrum. Or he might just be quietly amused.
I, as a beta, do neither. When someone yells at me I tend to cower in fear, and wonder why they're so angry. Then I wonder what I can do to mollify them, and whether they will ever like me again.
Sometimes others' anger at me is justified, sometimes not. But I tend to react the same way: what did I do wrong?
Next time someone yells at you, don't give him the satisfaction of either getting angry yourself or being cowed. Just act completely unaffected instead. Pick up a nearby apple and start munching on it (no one eats while upset). Or laugh at him, as if they are being cute. Even better, look as if you are trying to stifle a laugh. Those are the most eloquent ways of letting him know his opinion means nothing to you.
It occurs to me that my previous posts on this subject -- alphas vs. betas -- conflated narcissists with real alphas. Their behavior does overlap sometimes; then again, so does that of alphas and betas.
Perhaps the best way to put it would be to describe how each type reacts to criticism, whether or not it's delivered with a lot of volume. A real alpha just calmly analyzes it, and decides based on facts whether it is warranted. A narcissist angrily dismisses it as untrue, whether or not it is. And a beta tends to assume it's true, whether or not it is.
Of course, much of how you react to yelling has to do with how used to it you are. If you are in a combative profession, and encounter unpleasantness on a daily basis, you will be less fazed by it, whatever type you are.
If you're the one who usually starts the unpleasantness, though, you're probably a narcissistic personality yourself.