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Updated: Feb 26, 2026

The Modified Temptation Resistance Task: A Paradigm to Elicit Children's Strategic Lie-telling
Published on: April 6, 2018
Young children will lie to prevent a moral transgression
Teresa Harvey1, Telli Davoodi1, Peter R Blake1
1Department of Psychological and Brain Science, Boston University, Boston, MA 02215, USA.
Children as young as five can tell "interventional lies" to stop a third party from committing a moral transgression, especially when the harm is clear. This research explores the conditions influencing children's prosocial lying.
Area of Science:
- Developmental Psychology
- Moral Psychology
- Child Development
Background:
- Children understand lying is wrong but engage in prosocial lying to protect feelings or norms.
- Limited understanding exists on whether children lie instrumentally to prevent harm to a third party.
Purpose of the Study:
- To investigate the conditions under which 5- to 8-year-old children tell interventional lies.
- To determine if children lie to prevent a moral transgression against a third party.
Main Methods:
- Three studies (N=270) examined children's (ages 5-8) propensity to lie.
- Varied conditions included the intent of the seeker (theft vs. prosocial act), emphasis on harm, and the nature of the act (theft vs. positive action).
Main Results:
- Children lied more to prevent theft than a prosocial act.
- Emphasis on harm and the transgression (theft) significantly increased the likelihood of interventional lying across all age groups.
- Older children were more likely to lie in Study 1.
Conclusions:
- By age five, children can lie to prevent moral transgressions.
- Interventional lying is most likely when the transgression and harm to the victim are salient.
- Children's capacity for instrumental, prosocial lying develops by early childhood.
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