Many psychological models don't, but I do believe it's still used by people in that profession.
It is 'I know you are but what am I?' as an accusation, but as a label for actually quite complex coping mechanisms it holds to a certain extent.
( TFD is sporting this season's finest necropants, Wed 8 Jun 2011, 21:01, archived)

it's still very much used
and thankyou for saying what i couldn't be arsed to
(Mortal Wombat - he's just an excitable boy, Wed 8 Jun 2011, 21:02, archived)

Is this where you tell us that you're a leading psychologist and this was all an elaborate study?

( BraynDedd Natasha Kaplinsky's labia majora, Wed 8 Jun 2011, 21:02, archived)

nah.

(Mortal Wombat - he's just an excitable boy, Wed 8 Jun 2011, 21:03, archived)

This is where he says "lol I am above all this its really boring lol", and possibly does a *yawn* too.

( The Mock TurtIe ™ --- Thinks you are a cunt, on, Wed 8 Jun 2011, 21:05, archived)