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I included your quotes and the article excerpts above to give you some possible insight into what may be going on with your daughter. Bear in mind, I'm not a professional, but I am someone who has gone through what would be called psychosis in this culture. Also, please don't let the word "schizophrenia" frighten you -- think of the word as a means of describing forms of psychosis that haven't yet been resolved.

Psychosis can be produced in any number of ways. My own definition (and experience) is that psychosis is produced when one's sense of self-identity (what's sometimes referred to as the ego) is worn down, fragmented or shattered. It's worth noting that one's sense of self identity goes through transitional states of growth where it may already be "a little thin". For example, between the stages of life we call adolescense and adulthood, there is a stage of transitional vulnerability. Stress, trauma, loss -- these are also life experiences that can produce a weakening of the personality structure. Psychosis occurs at the point that the personality structure is weakened to the extent that aspects of the unconscious / subconscious begin to "leak" through.

In many ways, this is comparable to a dream state. For example, if your daughter's experience occurred in her sleep and she woke up frightened, we would call it a nightmare. Because it occurs during the day, when she's wide awake, we call it psychosis. Likewise, if your daughter had had a nightmare, you (or someone else) might talk to her and discover that the nightmare was not a random event but rather was related to life circumstances in her "ordinary" world. So too, psychosis can be related to life circumstances and if these are addressed and resolved, thereby strengthening the personality structure once more, the psychosis resolves itself naturally. That's my experience of psychosis.

I'd like to say more but I've got to get ready for work. Hopefully, others will add the insight of their own experiences to this thread and that will help you develop a clearer idea of what you can do to help your daughter.