Electroencephalographic study of 452 criminals and 1,432 control subjects reveals that when age factors and sampling errors are controlled there are no significant differences between the two groups. Since the EEG is a fairly reliable indicator of epilepsy and organic brain disease, it seems reasonable to conclude that subclinical forms of these disorders are not contributing factors in a significant faction of the "sane" criminal population.No significant correlation could be found between the EEG and the type of criminal behavior.Abstract Teaser