Prefix for "logical" or "analyst" (6)

I believe the answer is:

psycho

(Other definitions for psycho that I've seen before include "1960 thriller starring a deranged Anthony Perkins" , "Prefix denoting the mind or soul" , "Famous Hitchcock film about man with mental disorder" , "> fruitcake" , "Shy cop (anag) - 1960 movie" .)

I've seen this clue in the USA Today.

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