The aim of the following pilot study is to examine boredom in a community sample of adolescents and a clinical sample of adolescents. This is important in order to examine differences among healthy adolescents and adolescents with mental illness, such as depression, anxiety, and ADHD. This has implications for both prevention and intervention strategies and programs, such as the assessment and treatment of adolescents with mental illness. Hence, the results of this study will be important in providing an evidence-based practice in the treatment of mental illness in adolescents.