Michel, et al, I am a psychologist, and not to be repetitious, I refer you all to Joe Bruman's definition of lability, as it is used in psychological/psychiatric contexts: "From Taber's Medical Dictionary: "Labile": Not fixed, unsteady; easily disarranged; rapidly shifting and changing emotions. "Emotional lability": Excessive emotional reactivity associated with frequent changes or swings in emotions and mood." Marty Polonsky