Amanda Bynes has been transferred to the UCLA Medical Center for further treatment of her mental illness ... TMZ has learned.
Amanda was shielded by a blanket as she was taken Thursday from the psychiatric facility in Ventura County to UCLA. We're told her mom -- who is now Amanda's temporary conservator -- wanted the actress admitted to UCLA because it has one of the best psych facilities in the nation.
Our sources say Amanda would have been transferred earlier but a bed wasn't available until Thursday.
As TMZ first reported ... we're told Amanda has shown clear signs of schizophrenia ... but doctors continue to perform tests to evaluate her condition.