Criminologists also study a host of other issues related to crime and the law. These include studies of the Victims of Crime , focusing upon their relations to the criminal, and their role as potential causal agents in crime; juvenile delinquency and its correction; and the media and their relation to crime, including the influence of Pornography . Much research related to criminology has focused on the biological basis of criminal behavior. In fact, a field of study called biocriminology, which attempts to explore the biological basis of criminal behavior, has emerged. Research in this area has focused on chromosomal abnormalities, hormonal and brain chemical imbalances, diet, neurological conditions, drugs, and alcohol as variables that contribute to criminal behavior.