From Wiki:Psyche is the personification of the soul.
"In psychology, the psyche is the totality of the human mind, conscious, and unconscious. Psychology is the scientific or objective study of the psyche. The word has a long history of use in psychology and philosophy, dating back to ancient times, and has been one of the fundamental concepts for understanding human nature from a scientific point of view. The English word soul is sometimes used synonymously, especially in older texts."
This is pretty close to Freud's ego, id, superego, and subconscious combined. There is no implication that it is supernatural, immortal, or can exist disembodied. This meaning of "soul" is, as I said, radically different from the Christian usage. Confusing the two by conflating them in an equivocation fallacy is a terrible logical error, and is what Trifecta needs you to do to think that anything Parnia is studying has anything to do with his bible.
What does soul mean in Black American culture, as in Eldridge Cleaver's "Soul On Ice," or soul food? Neither of the two meanings above. That's a third word sharing a common spelling, pronunciation, and etymology with the others, but distinct in meaning today.