A 35-year-old woman recently diagnosed with bipolar I disorder is confused about her diagnosis and skeptical about taking lithium. Her PMHNP spends the session systematically explaining the neurobiology of bipolar disorder, the role of mood stabilizers in preventing manic and depressive episodes, early warning signs of relapse, and the importance of maintaining sleep-wake routines. Afterward, the patient reports feeling less anxious and more empowered to participate in treatment decisions. Which intervention was primarily delivered?