This document discusses assessment of psychological problems in patients with neurological disorders. It notes that assessment may help with differential diagnosis or identifying treatable psychiatric conditions. Assessing psychological symptoms can be complicated by overlap with neurological symptoms. Clinical interviews and observations can be aided by checklists of psychological symptoms. Self-report instruments and reports from family members can also provide information, especially for patients with cognitive impairments. The document discusses several methods and instruments used to assess conditions like depression, anxiety, apathy, psychosis, and more.