This question is related to What is the current "accepted" science behind dream interpretation?, but here I am asking something more specific.
Dream reports, also known as sleep mentation reports, are a common tool in dream research (eg, McNamara et al, 2010), which in turn, is mostly useful for learning about dreaming and sleep in general. However, I am interested in whether such reports could be useful for learning something about the specific individual. My question therefore is:
Does there exist a validated instrument that takes dream content (eg, in the form of sleep mentation reports) as input, and using a (blinded) expert analysis or better yet, computer program, predicts something useful at the individual level?
For example, can dream content predict something about the subject's personality, intelligence, psychopathology, physical health, emotional state, recent events, unresolved problems, life course, or anything else of value, using a validated instrument?