Watson establishes constructs of positive and negative affect comprising more specific emotions such as joviality, self-assurance, fear, sadness, guilt, and hostility. Life events tend to have quotidian severity—student examinations, not deaths—and "depression" is an affective dimension comparable to anger, not a syndrome. In Watson’s quasibiopsychosocial model, temperament and mood interact with environment, endogenous and sociocultural rhythms, and individual variability. Temperament dominates, however. Life seems reducible to positive and negative affect, a one-note (or two-note) symphony.