Which symptom involves observable changes in movement or activity levels?

• A. Fatigue
• B. Psychomotor agitation or retardation
• C. Weight change
• D. Not attributable to substances

Answer: (B)

The main concept here is recognizing psychomotor changes as observable alterations in movement or activity levels. Psychomotor agitation or retardation describes visible differences in how a person moves or communicates—agitation means restlessness or rapid, excessive movement and speech, while retardation means slowed physical movement, slowed speech, and slowed thinking. These changes are observable by others, making them distinct from fatigue, which is a subjective sense of tiredness, or from weight change, which reflects body mass rather than movement. The option about not being attributable to substances is a diagnostic consideration, not a description of movement or activity.