Oh Dennis...I am going to have to retrieve Liebert....I think what she may have done is split stage 4 and then a second more advanced stage 4 that is more 5 like and I know she split the majority pop sort of in half between the two.

Liebert was/is very interested in stage movement ...I think this is where she is incorporating many other developmentalists and looking at what moves folks stage wise, how they retreat when threatened, what risks are involved in "forward movement"....I found her book fascinating, but not an easy read.

She did review my stuff....and gave me grief on my preference for more mature development I can still hear her saying: "everyone has a perfect right to be wherever they are developmentally"!