Hi, friend! As you may also know that there are positive links between anger bias and aggression among children and adolescents who have been maltreated or exposed to violence, we hope to examine whether this bias can be reduced through our service, thereby preventing their aggressive responding. Our service plans to provide positive emotion training. However, we are trying to figure out what kinds of measurements could be used in our program evaluation. Would you please kindly give me some advice?

No problem ?

Thank you for the great suggestion!

First of all, your measures should include questionnaires used to screen participants for eligibility in the project. Measures relevant to your project could include a demographic questionnaire (e.g., age, gender, race), a measure of pubertal phase, and measures tapping aggression, anger, conduct problems, callous-unemotional traits, and arrest records. The Pubertal Development Scale is a widely used self-report scale with good reliability and moderate-to-strong correlations with hormonal and physical indicators of pubertal development.

You may find more information with their original paper:
Petersen, A. C., Crockett, L., Richards, M., & Boxer, A. (1988). A self-report measure of pubertal status: Reliability, validity, and initial norms. Journal of Youth and Adolescence, 17, 117–133