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<p>PhD programs are nothing like undergraduate programs. As an undergrad, you have a list of classes to take. You take those classes earning the highest grade you can. When you complete those classes, you’re done.</p>
<p>PhD programs don’t have a path. And they’re not class-based. You take some classes here and there, but the vast, vast, majority of your focus is on research: getting a faculty member on your side, finding a novel set of research questions, designing experiments, performing experiments, analyzing the results, writing papers. And exams in PhD programs are different. You have quals and comps, which are usually multi-day long exams that test you on anything and everything in your field (even if you haven’t learned it). At the end, if you pass the written portion, you’re orally grilled by faculty (the first of many time they will orally grill you).</p>
<p>And PhD programs are depressing. In a BS program, you’ll get “successes” throughout to motivate you: an A on a test here, an A in a class there, etc. Plus, you know when the program will end because there’s a defined graduation criteria so you can focus on that. In a PhD program, it’s 5 years of 80 hour weeks and you’ll have maybe 2 or 3 “successes” the entire period. Also, there’s no defined end. Your dissertation is done when it’s done. And you have no idea when it’s done, it’s up to a committee to determine when they think it’s done. It could be 5 years, it could be 7, it could be 9. You have no control over it.</p>
<p>And through all of this, about half of the people that come in with you will drop out (and there’s a good chance you’ll be one of them). If you want to talk about depressing, think about 3 or 4 years of college with no degree to show for it. </p>
<p>In summary, unless you’re highly motivated at the start and know exactly what you want to research for the rest of your life, don’t do it. You’ll end up bitter by the end and you’ll probably drop out. Don’t chase “the letters” like some people. Even after you get your PhD, no one will call you “Dr.” except in academic settings and on wedding invitations (and most people forget then).</p>