Lie-telling for personal gain in children with and without externalizing behavior problems

Few studies have examined the lie-telling behavior of children who have externalizing problems using experimental procedures. In the current study, children's lie-telling for personal gain (N = 110 boys aged 6-11 years) was examined using an experimental paradigm in relation to their theory-of-mind abilities and inhibitory control as well as their moral evaluations of truths and lies. Children with externalizing behavior problems (n = 53) were significantly more likely to lie and to be less skilled at lying than a typical comparison group (n = 57). Children who had lower theory-of-mind scores were significantly more likely to tell a lie for personal gain compared with those who had higher theory-of-mind scores. Children with externalizing problems who told personal gain lies were also more likely to rate tattle truths more positively than other children. For a subsample of children (n = 55), parent-reported diaries of the frequency of children's lies over 2 weeks revealed a higher frequency of lies by children with externalizing problems compared with the typical comparison group. Children whose parents reported a high frequency of lies for their children were also more likely to lie in the experimental personal gain lie paradigm. Results suggest that children with externalizing behavior may have a different pattern of lie-telling than has been previously reported for normative lie development.