No, I can usually tell the difference between things I picked up by reference, and things I actually read. Most of the references in Psycho I knew from references before I ever saw the movie (only a year or two ago, actually). "It's a Good Life" on the other hand, I knew I'd read first (actually, that was one I know we studied in Speculative Fiction in high school). I'm very close to positive that I've read the short story, and the screen shots from the Twilight Zone ep don't ring any bells for me at all. Unfortunately, trying to find what short story collections it might be in is almost impossible, since every search pulls up Twilight Zone references, and if I exclude it, I'm only getting a very few links. Once I get home, I can check the most likely collections -- I have about two shelves of SF short stories, including the primary text from my class.