Incorrect prediction where a person predicted not to be violent acts violently.
Incorrect prediction where a person predicted to be violent is not.
Correct prediction where a person predicted not to be violent does not act violently.
The statistical difficulty in predicting rare events, inevitably leading to a high number of false positive errors.
The psychological bias of believing two unrelated events are correlated, such as an intuitive feeling and actual dangerousness.
Correct prediction where a person predicted to be violent engages in violence.