This study examined the impact of ITV intervention on reduction in the propensity to abuse substances and engage in drug trafficking. The researcher conducted this study using an experiment of 517 vulnerable adolescents aged 10-19 years. The participants were randomly assigned to control (n = 258) and treatment (n = 259) groups. The researchers found a significant main effect of treatment conditions on reduction in the propensity to engage in substance abuse and drug trafficking among vulnerable adolescents. That is, before the intervention, there was no significant statistical difference between the control and treatment groups on the propensity to engage in substance abuse and drug trafficking. However, vulnerable children who received the intervention reported a significant reduction in propensity after the intervention. The results highlight the usefulness of ITV as a behaviour change strategy for vulnerable children.