Which of the following is NOT classified as a neurocognitive disorder?

The classification of neurocognitive disorders specifically includes conditions that primarily involve a decline in cognitive function, such as memory, attention, or executive functioning. Major neurocognitive disorder, minor neurocognitive disorder, and delirium all fall under this category as they directly relate to disturbances in cognitive abilities.

Major neurocognitive disorder refers to significant cognitive decline that interferes with independence in everyday activities, while minor neurocognitive disorder involves a modest decline that does not significantly impair daily functioning. Delirium is an acute, often reversible condition characterized by a rapid onset of confusion and cognitive disturbances due to underlying medical conditions or substance effects.

Anxiety disorder, on the other hand, primarily involves excessive worry, fear, or anxiety that affects emotional regulation and behavior but does not inherently lead to cognitive dysfunction in the manner that neurocognitive disorders do. Therefore, anxiety disorder is the correct answer as it does not fit into the neurocognitive disorder classification.