“…The second aim of the study was to investigate the role of psychopathic features for the associations between sleep and delinquent behaviour. Based on our previous results (Aronen, E. T., Laajasalo, T., Backman, H., Saukkonen, S., Salmi, V., Jokela, M. and Kivivuori, J., unpublished data) and earlier literature in adults (Hare, 1970;Meldrum et al, 2015), we hypothesized that controlling for psychopathic features would diminish the size of the effect between sleep and delinquent behaviour. Finally, we also controlled for parental supervision in all of the analyses, as it is a variable known to be linked positively to the amount of sleep among adolescents (Adam et al, 2007) and negatively to youth delinquency (Clinkinbeard et al, 2011).…”