NV is а 32-yeаr-оld mаle whо wоrks for a janitorial service at night in a large medical office building. He spends his free time playing video games but doesn't seem to take pleasure in them. He lives alone in a small apartment complex and rarely interacts with his neighbors. When he does encounter one of his neighbors at the communal mailbox, he comes across as cold and uninterested. These behaviors are consistent with: