Why do some players immediately resign the moment they lose the momentum? Is it ego? Pride? Shame?

Would you say that most chess players are introverts?

Most chess players introverts? OH YEAH.

I was just asking for opinions. I think probably yes but others will have different experiences.

Man, Chess players are offended by anything. Personally, I'll resign when I reckon it's very unlikely that I'll win. Then I choose to spend my time playing a new game. Sometimes I like to see how it ends and play until mate. Apparently you are the party pooper in both conditions.

I don't think I'm qualified to answer that. In my opinion, I think most chess players are pretty representative of the general population. All kinds of different people. 

I play chess regularly with only about a half dozen people, I don't go to a chess club or play in tournaments. Of the people I play chess with, none are really introverts. 

Maybe if you haven't played chess at congresses. Thanks for responding though. There is a similarity between club and congress players, in my mind. A lot of chess players seemed to me very down to earth and on the quiet and maybe self-assured side. But even so, it seemed there were always those who would take offence easily. One had to be careful, as a team captain, in dealing with others. I mean, with those on opposing teams. And as someone who ran a big chess club's competitions for a few years, I thought there were always those who were impossible to please or who thought their ideas of how a competition should be run were far better and should take therefore precedence. I mean grown adults, instead of just accepting the fact that the proper place for dissent is at the next AGM or in a special meeting to discuss it before the club's officers are elected. I mean, one would have liked to tell the few idjits what one thought of them but they'd just make a noise and then desert to another club. And they wondered, at a later date, when we were short of a team captain, why me and another person, who had both been first team captains .... first me and then him when I temporarily left the club .... refused point blank ever to be a team captain again! 15 years ... quite enough.

It's sort of on topic ... misplaced ego.

I rather get those players than players who have given up and stall just to be unpleasant (also known as: the word starts with and A and ends with hole) (meaning: they have no intention to keep playing the game) and hope that you abandon just out of boredom from lack of activity from his end.