American actor, writer and comedian B. J. Novak told this joke in his stand-up comedy act by at least 2003:
 
“I learned nothing in college. It really was kind of my own fault. I had a double major—Psychology and Reverse Psychology.”
 
The joke has been reprinted many times, often without credit to Novak.
 
   
Wikipedia: B. J. Novak
Benjamin Joseph Manaly Novak (born July 31, 1979), credited professionally as B. J. Novak, is an American actor, comedian, screenwriter, author, and director. He is most widely known for being a writer and executive producer of The Office, in which he also played Ryan Howard.
     
Comedy Central—Stand-Up
B.J. NOVAK - DOUBLE MAJOR
NOVAK, RAWLINGS, LAWLESS, LIBERMAN SEASON 7, EP 5 12/26/2003
B.J. Novak learned nothing in college. (3:23)
 
6 December 2005, Boston (MA) Globe, “Class Reunion: Schoolmates from Newton meet again in The Office” by Christopher Muther, pg. C13:
It was his acerbic humor and ability to throw a slow-burning stare that led to his current job in “The Office.” He (B. J. Novak—ed.) was the first actor hired for the show before Steve Carell after executive producer Greg Daniels caught his stand-up routine.

“He started off with this joke where he said, `I just graduated from college, but I didn’t learn much. I had a double major. Psychology and reverse psychology.’ I immediately knew I wanted to do something with him,” says Daniels, whose credits include “The Simpsons” and “King of the Hill.”
   
New York (NY) Times
A Major Promotion at ‘The Office’
By EDWARD WYATT SEPT. 23, 2008
(...)
“Greg happened to see me at the Improv in L.A., and I had a very good night,” Mr. Novak recalled. “I remember he liked a line I had: ‘I spent four years in college. I didn’t learn a thing. It was really my own fault. I had a double major in psychology and reverse psychology.’ ”
 
Twitter
ɥʇɹnʞ ʞǝɹǝp‏
@dkurth
I spent 4 years in college. I didn’t learn a thing. It was really my own fault. I had a double major in psychology and reverse psychology.
12:54 PM - 24 Sep 2008
 
Facebook
Comedy Central Stand-Up
March 7, 2012 ·
Joke of the Day from BJ Novak (from “The Office”): “I learned nothing in college. It was really kind of my own fault. I had a double major: psychology and reverse psychology.” http://on.cc.com/xR16uL
 
Twitter
Ajay Shah‏
@ItsAjayShah
‘I spent 4 years in college. I didn’t learn anything. It was really my own fault. I had a double major in psychology and reverse psychology’
12:16 AM - 2 Mar 2014
 
Reddit—Jokes
I spent four years at college and didn’t learn anything…
submitted May 1, 2017 by netsandjets
It’s really my own fault. I had a double major in psychology and reverse psychology.