A more controversial application of this rule has come in cases of rape allegations, with prosecutors wishing to call expert witnesses to explain the psychological effects of rape upon victims, and how these may manifest themselves in specific cases. In a Government consultation paper, 'Convicting Rapists and Protecting Victims – Justice for Victims of Rape',[17] it was considered that the mental state of rape victims is generally outside the expertise of the public, and thus exceptions should be made for prosecutions to call experts on their behalf. The problem currently is demonstrated where defendants attempt to discredit rape victims by highlighting abnormalities in their behavior after any alleged incident.[18] Such behavior is demonstrably compatible with that of a rape victim, but as expert witnesses are not allowed to testify as to this, the jury is often faced with deciding against an incomplete factual background.[19]