How honestly do male adolescents report their definquent behaviour?: Results of an external validation of self-reported delinquency

Survey-based studies on the prevalence and causes of deviant behaviour very much depend on the honesty of respondents. However, the validity of self-reports is rarely investigated. We report on a external validation of self-reported delinquency of male juveniles based on two survey samples-face-to-face interviews in households (N=309), and paper and pencil interviews in school (N=337)-which have been done in 1999 and 2000 in Freiburg and are used for record checks of self-reported police contacts both on the individual and aggregate level. Individual-level record checks reveal that a majority of respondents has honestly reported contacts with the police, while there are a considerable number of both 'false negative' and 'false positive' answers which come predominately from respondents with low educational and social status and of migration background. As these groups show high non-response rates as well, the correlation between delinquency and socio-economic status is likely to be underestimated. The school survey, on the other hand, yields higher and more realistic prevalence rates. However, comparisons between the two survey modes hint at differential effects of social desirability which question the validity of self-reports by respondents with high educational status. Survey results on self-reported delinquency should generally be interpreted with great caution, and more research on the mode effects of class room interviews are deemed necessary.