All 3 Uses

differentiate
in
How to Read Literature Like a Professor
(Edited)

Beyond that, though, is another element: character differentiation.
Chpt 21

differentiation = making different than others
So what's going on here? Character differentiation, certainly. The missing member sets Jake apart from everyone else in the novel, or any other novel I know of, for that matter.
Chpt 21 *
Both of these first two readings have picked up what is most central to the story, namely the growing awareness of the main character to class differentiation and snobbery.
Chpt 27 *

differentiation = differences or treatment as different

Definitions:

(1) (differentiate as in: differentiate between right/wrong)
to recognize difference
(2) (differentiate as in: differentiate our product)
to make different; or to show difference
(3) (meaning too rare to warrant focus)
See a comprehensive dictionary or Wikipedia for specialized senses of differentiation including definitions in the fields of mathematics, biology, geology, and the social sciences.