[Biological and experimental markers of sexual aggression]

Forty men who committed sexual offences with a varying extent of aggressiveness were examined by a series of psychological tests, phalloplethysmography and electroencephalography. The plasma testosterone level was assessed and in indicated cases the karyotype. Frequently in the delinquents an abnormal course of psychosexual development was revealed, disorders of sex life, the presence of sexual deviations and atypical EEG findings. The extent of aggression of the offence correlated significantly with younger age of the delinquent and the result of the phalloplethysomographic examination. Prediction of future aggressive behaviour of a subject is difficult even when modern examination methods are used.