Neural network topology in children's deceptive behaviors: The role of cognitive control and reward processing

The neural mechanisms related to children's deceptive behaviors remain relatively unexplored. This study aims to address this gap by using measures of functional brain network topology, focusing on the cognitive control and reward processing networks that are closely related to children's deceptive behaviors. The study included 113 6-year-old children from the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) project, a birth cohort study. Children participated in the Dart Game designed to assess their tendencies to cheat and lie. During the game, children were required to throw the ball at a long-distance dartboard without supervision, which provided opportunities to cheat by breaking the rules. After the game, children were questioned about whether they had followed the rule, which provided them with opportunities to lie. Resting-state functional magnetic resonance imaging (rs-fMRI) data were collected from all children at the same age during a different visit. We compared three network topology measures (cognitive control network recruitment, reward processing network recruitment and reward-control network integration) between non-cheaters and cheaters, as well as between non-liars and liars. The results showed that a higher degree of cognitive control network recruitment was associated with a greater likelihood of lying. Moreover, a higher degree of reward-cognitive control network integration was associated with a lower likelihood of cheating and lying. The degree of reward processing network recruitment was not associated with deceptive behaviors. These findings help to elucidate how neural mechanisms of cognitive control and reward processing contribute to deceptive behaviors in young children.