not that I think you asked for this reason, but just in case- i hope you're asking because you want to expound your mind and not just take it to improve your focus in poker. learning more can definitely help in this regard, but i'd stray away from seeking out something only for its benefit on poker.

moving forward, i studied economics and political science and now work as a computer programmer in florida.

extra classes i took that ended up helping me think more broadly and as a result had an application in how i approach poker-

calculus, statistics (this is by far the most useful class anyone anyone anyone anyone anyone can take), game design, intro to psychology

i took calculus in my 2nd to last semester of college because i love patterns, and math is at its core recognition and acknowledgement of patterns. when you get into the “rules” of how you can treat derivatives and integrals (these rules are just explanations of how these patterns work relative to wherever you're coming from), you need to think a few steps in or out. this is a skill/ability/whatever that is necessary for literally all postflop play, but more importantly for me anyway, it allows you to think of yourself and your decisions' impacts on the overall game.

i took statistics in high school, and have loved math since as far back as i can remember, so i was ecstatic that my major required me to take the class because i was probably going to do it on my own anyway. without understanding what variance is, you and everyone else are doomed to the woes of the swings in life…literally no matter what the subject is. i truly believe my sense of being and personhood is grounded firmly in my understanding of statistics and without it, i wouldnt be the same person. if you can't understand why something can take place where the math says it wouldn't, youre going to be angry and hate life eventually. a few years ago, while at a girlfriends familys house for thanksgiving, there was a story on the news about premature babies being linked to some sort of intellectual defect. i don't remember specifics, but that's what it was. math said that if youre not born with the right amount of time developing (x), you have this (y). obviously nothing takes place 100% of the time, and it doesn't really take a genius to know that this doesn't say that all prematurely born babies will turn out this way, but thats how my girlfriend took it. she was born a couple of weeks early and is a smart person, but she got really defensive about it. i couldn't understand it until i realize she just didn't understand what variance was. tldr- we're not playing chess, your decisions have small impacts over big bell-shaped curves.

game design- there's some math involved when you assign movements to keystrokes or mouse movements, and it helped me think about how small changes have impacts on your overall result.

intro to psych- honestly, most intro stuff is really really easy to learn/understand because it makes sense. we all have sort of a grasp on basic psych concepts just by living our day to day lives. i'm hesitant to put it on here, but i met my first real poker friend in this class. i caught him playing on fulltilt through a vpn or ghosted teamviewer account, which i saw as only having a few explanations- either degen, successful, knows someone who is successful. well he only opened up full tilt that one day in class and didn't have an account there at all. i just happened to see him playing at the exact right moment. he was a merge grinder and his brother's a full time pro. he taught me a ton and i wouldn't have nearly the motivation i have now if not for that class.