Oppositional Defiant Disorder Test is an iPhone application developed by Inquiry Health LLC. This educational tool aims to assess a child's risk for Oppositional Defiant Disorder through a validated screening questionnaire. The disorder is characterized by patterns of anger, defiance of rules, and vindictiveness towards authority figures, often affecting children aged 6-12.

It can be challenging to differentiate between a child displaying normal emotional behaviors and one with Oppositional Defiant Disorder. This screening tool can provide insights and help in early detection. However, it's crucial to note that this test is not a diagnostic tool, and a formal diagnosis should be sought from a qualified healthcare professional.