"Psychology" in chess is usually overrated. If you keep in mind that there is no information available but the moves being played and the time being spent on them, it should be clear that much of psychologizing is simply made up, It happens in your mind only and has no relation with reality.
The best antidote is to build up self-confidence, which comes with skill and experience. If you are able to objectively judge if a move is good or bad, and if you are confident in your judgment, you are no longer prone to see things which aren't there.
As a beginner/amateur chess player, I've come across people who've played using psychological factors, or 'mind games' (outside of the actual game of chess) to win a game, or use it to their advantage. Perhaps I am a little biased, for I recently lost points to an opponent who I believe is probably rated below me due to these factors, but I'm interested in what other people's opinions on these are? And whether I should start studying psychological tactics, as well as chess tactics v.>
Here's a link a website which I think explains the rough gist of what I mean by 'psychological tricks' much better than I can explain: http://www.wikihow.com/Use-Psychology-to-Win-Chess-Games
And also: http://chess.stackexchange.com/questions/1567/psychological-tricks-in-chess
These are the types of 'psychological factors' that I often fall to. (Not the ones listed there specifically, but I think you get the idea).
And I'm just wondering if those are important to the game, and whether I should start studying those. Because I find myself losing to them.
(mini-rant) It also feels kind of unfair when that happens, because I feel like the player is trying to cheat me or mislead me or something. But idk, maybe I'm just irrationally angry, which in that case, ignore this thread ^^"