Correlates of crime

The statistical correlations of criminal behavior explore the associations of specific non-criminal factors with specific crimes.

The field of criminology studies the dynamics of crime. Most of these studies use correlational data; that is, they attempt to identify various factors are associated with specific categories of criminal behavior. Such correlational studies led to hypotheses about the causes of these crimes.

The Handbook of Crime Correlates (2009) is a systematic review of 5200 empirical studies on crime that have been published worldwide. A crime consistency score represents the strength of relationships. The scoring depends on how consistently a statistically significant relationship was identified across multiple studies. The authors claim that the review summarizes most of what is currently known about the variables associated with criminality.

Crime occurs most frequently during the second and third decades of life. Males commit more crime overall and more violent crime than females. They commit more property crime except shoplifting, which is about equally distributed between the genders. Males appear to be more likely to reoffend. Measures related to arousal such as heart rate and skin conductance are low among criminals. Mesomorphic or muscular body type is positively correlated with criminality, in particular with sexual crimes.Testosterone levels positively correlate to criminal behavior.

When controlling for age and sex, strong genetic correlates with criminality. Low monoamine oxidase activity and low 5-HIAA levels tend to be found among criminals.Monoamine oxidase A (dubbed the "warrior gene" in the popular press) is strongly tied to an increased tendency towards violent crime. In addition, CDH13, a gene previously tied to an increased risk of substance abuse, has been tied to violent crime. These tendencies are ostensibly related, as the majority of all individuals who commit severe violent crime in Finland do so under the influence of alcohol or drugs. The presence of the genetic profile is not determinative, although it increases the likelihood of in cases where other factors are present. Ferguson stated, 'a large percentage of our behaviour in terms of violence or aggression is influenced by our biology - our genes - and our brain anatomy.' Schnupp stated, 'To call these alleles "genes for violence" would therefore be a massive exaggeration. In combination with many other factors these genes may make it a little harder for you to control violent urges, but they most emphatically do not predetermine you for a life of crime.'

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