The word Schizophrenia literally means 'split mind'. It refers to disconnected thought processes and a loss of contact with reality.
DSM-IV and ICD-10 are the most commonly used diagnostic tools.
According to ICD-10, at least one item from list one, and two items from list two must be present for at least one month.
Thought control (Including thought withdrawal, insertion, and broadcast.)
Delusions of control, influence and passivity, (Not feeling in control of own thoughts, feelings…