Offender surveys collect information from offenders, in order to develop an understanding of their behaviour and attitudes. One example is the Offending Crime and Justice Survey (OCJS), which was a longitudinal study carried out between 2003 and 2006. In 2003, a sample of people aged 10 to 65 was taken and then about 5,000 of them were followed-up longitudinally until 2006. It collected data from a variety of areas including self-reported offending, indicators of recidivism (repeat offending), and the types of offences committed.