Actually, the quoted statement supports the opposite conclusion, since the real and hallucinatory shocks are both refered to as "it."
----- Original Message ---- From: Vincent Clarke <pclarkepvincent at gmail.com>
"Schizophrenics who experience tactile hallucinations of pricking or of 'electric shocks' jump when they feel an injection of ethyl chloride or a real electric shock: 'That time,' they say to the doctor, 'you are the cause of it, because you are going to operate'" (p 389).
So the individual themselves know well the difference between their hallucinations and reality.