Carroll Izard

Carroll Ellis Izard (born 1924) is an American psychologist known for his contributions to Differential Emotions Theory (DET), and the Maximally Discriminative Affect Coding System (MAX). DET maintains that universally recognizable innate, basic emotions emerge within the first 2 to 7 months of post-natal life "without facial movement precursors" (Izard, et al., 1995), and argues for congruence of emotion expression and subjective experience (Izard & Abe, 2004). He also proposed the facial feedback hypothesis according to which emotions which have different functions also cause facial expression which in turn provide us with cues about what emotion exactly a person is feeling.