Long story short, I got in a PhD program freshly out of undergrad. This is my first semester. During under, I was building myself toward cognitive psychology (psychology + stats + a little bit of programming). Turns out, no cognitive psychology program wanted me, and the only option left was a math psych program. Well, I decided to go for it. Turns out, I was put under an advisor who is very theoretical (I prefer to call him a mathematician than a psychologist or psycho-physicist).