Great episode. I'm no Dr. Nicholson so I can't tell you what a real Rhoda might suffer from—but in the 1950s,(apologies if you already know this) all this selfish, spoiling, bad mother (or in the case of Monica, maternal figure) stuff, especially put next to "feeble-mindedness" and easily manipulated men, has a lot to do with the ideas about psychology and parenting in Philip Wylie's Generation of Vipers, a book whose analysis has a lot to do also with Rebel Without a Cause, Psycho, and probably every other example of pop-abnormal-psych cinema from the 1950s. (Wylie also maybe had something to do with inspiring Superman, so, you know, his fingerprints could be in a lot of places.)