In the mental status exam, affect is the outward expression of emotion. Which statement best describes congruent affect?

• A. Affect is the outward expression of emotion; it always mirrors the patient's reported mood.
• B. Affect is the outward expression of emotion; it can be independent of mood.
• C. Affect is the outward expression of emotion; congruent means mood and affect match, while incongruent means they do not match.
• D. Affect is irrelevant to mood in the mental status exam.

Answer: (C)

Congruent affect means the outward display of emotion matches the mood the patient reports and fits the situation. In the mental status exam, you’re looking for alignment between what the patient says they feel and how they appear to express it—facial expression, voice, and gestures should be consistent with that mood. For example, a patient who says they are sad should show a downcast facial expression, slower and softer speech, and a somber tone. If the patient reports sadness but their facial expression or tone seems happy or inappropriate for the topic, that would be incongruent affect.

Affect can sometimes be blunted or restricted, or momentarily out of step due to various factors, but the defining feature of congruent affect is that mood and outward expression align. The statement describing congruent affect as mood and affect matching, with incongruence meaning they do not match, captures this essential idea.