Developed in 2008 and revised in 2009, Jeffery Young and his team created a questionnaire for measuring the strength of Schema Modes. Using 124 questions, it measures 14 modes, including Child Modes, Maladaptive Coping Modes, Dysfunctional Parent Modes and Healthy Adult.

It is important to note that there is contention with the Schema Modes measured in the current version of the SMI. Particularly in relation to the Enraged Child, Impulsive Child and Undisciplined Child modes. Some Schema Mode Therapy practitioners feel these labels feed into the messages that the child was the problem, instead of remembering that the child is Vulnerable and the problem is with the dysfunctional parents.