Affective Lability

A pattern of rapid, unpredictable shifts in emotional state, often involving intense fluctuations between positive and negative moods with minimal external provocation. Affective lability is commonly associated with ADHD, bipolar disorder, and borderline personality disorder, though the pattern and triggers differ across conditions. In ADHD adults, affective lability typically involves quick emotional reactions that subside relatively fast, unlike the sustained mood episodes seen in bipolar disorder. Understanding these distinctions is important for designing appropriate assistive technologies and avoiding assessment tools validated for one population being misapplied to another.