I did not know what any of this was either still not sure so here is what I found online, but you described IOP right on!

Cognitive behavioral therapy (CBT) is a psychotherapeutic approach that addresses dysfunctional emotions, maladaptive behaviors and cognitive processes and contents through a number of goal-oriented, explicit systematic procedures.

Dialectical behavior therapy (DBT) is a therapy designed to help people change patterns of behavior that are not effective, such as self-harm, suicidal thinking and substance abuse. This approach works towards helping people increase their emotional and cognitive regulation by learning about the triggers that lead to reactive states and helping to assess which coping skills to apply in the sequence of events, thoughts, feelings and behaviors that lead to the undesired behavior. DBT assumes that people are doing the best that they can, but either are lacking the skills or are influenced by positive or negative reinforcement that interfere with one’s functioning.