I think it is a hyped up urban legend that Lucas consulted a Child Psychiatrist for the ESB revelation. I know he said it on the ESB '04 Commmentary, but he also said on those same commentaries that the story was always about the Tragedy of Darth Vader, which we all know that is utter bullshit. Another bullshit statement by Lucas is that he fought FOX to put Episode IV in the original crawl in 1977, yet his first draft of ESB documented from 'The Annotated Screenplays' is called Star Wars: Episode II. It wasn't called Episode V til the third draft!

My point is that there are alot of exaggerated myths in Star Wars lore after all these years, as Lucas enjoys revisionism towards the Star Wars movies. I'm sure it was discussed how kids would react to Darth Vader's revelation, but I don't buy that Lucas went out of his way to consult a professional opinion on this.

Sorry, but I have heard too many lies and exaggerations throughout the years from Lucas to believe alot of his nonsense these days.