Pseudobulbar Affect

A neurological condition characterized by episodes of involuntary, exaggerated, or inappropriate emotional expression — such as uncontrollable laughing or crying — that may not match the person's actual emotional state. Pseudobulbar affect occurs after damage to the neural pathways that regulate emotional expression, commonly resulting from traumatic brain injury, stroke, multiple sclerosis, or ALS. In social contexts, PBA can cause significant embarrassment and social isolation, as others may misinterpret the emotional displays. For technology design, PBA is relevant because voice assistants and conversational agents may misinterpret emotional vocalizations, and social communication tools need to account for the disconnect between expressed and felt emotion.