Flat Affect
Absence or marked reduction in emotional expression observed in speech, facial expression, and gestures.
Full Definition
Flat affect describes a severe reduction or absence of emotional expressiveness that is observable through monotone speech, lack of facial expression, and minimal gesturing. This symptom is commonly seen in schizophrenia, severe depression, and certain neurological conditions. Unlike blunted affect, which shows some emotional expression, flat affect represents an almost complete absence of emotional responsiveness. The assessment focuses on observable behavior rather than the patient's internal emotional experience. Editors should note that this is a clinical observation term, not a judgment about the patient's emotional capacity.
Usage
Usage note: Always hyphenate when used as a compound modifier; 'affect' is a noun in this context.
In Context
- "The patient displayed flat affect throughout the interview, showing no facial expression even when discussing distressing events." — mental status examination
- "Her flat affect made it difficult to gauge her emotional response to the treatment plan." — therapy progress note