Biological Factors in Crime #2
PART 2 Hormones In 1980 Dan Olweus et al measured blood testosterone level in institutionalised delinquent and non-delinquent 16-year-old boys and assessed aggression using a questionnaire. High levels of self-reported physical and verbal aggression were associated with higher levels of testosterone – though the results were not statistically significant. It was also noted that those with higher levels of testosterone were likely to respond more vigorously in response to challenges from teachers and peers. John Archer (1991), in a meta-analysis of 5 studies covering 230 males, found a low positive correlation between testosterone and aggression. However, the type of participant and the form and measurement of aggression differed substantially between the studies. Angela Book, Katherine Starzyk & Vernon Quensy (2001), in a meta-analysis of 45 studies, found a mean correlation of 0.14 between testosterone and aggression – though John Archer, Nicola Graham-Kevan & Michelle Davies (2005) challenged Book, Starzyk & Quinsey’s findings on the grounds of methodological problems with the study which meant that a correlation of 0.08 was more appropriate. James Dabbs et al (1987) measured salivary testosterone in 89 violent and non-violent criminals and found those with a history of primarily violent crime had the highest levels of testosterone whereas… Read More