is the building block
of primate PSYCHOLOGY.
The Big Bang Theory Season 5, Episode 6
You know, PSYCHOLOGY journals,
Internet research.
The Big Bang Theory Season 1, Episode 6
But you know,
as a student of PSYCHOLOGY
The Big Bang Theory Season 7, Episode 4
for my PSYCHOLOGY class.
The Big Bang Theory Season 7, Episode 4
Oh, Sheldon, are we really gonna go
with pop PSYCHOLOGY?
The Big Bang Theory Season 1, Episode 10