Ernest. A. Haggard and Kenneth. S. Isaacs were the first who discovered these micro- expressions in 1966. Haggard and Isaacs have described in their work about how they were able to identify these micro- expressions and what are the ideas they took up to identify these micro- expressions such as scanning the psychotherapy movies for hours trying to identify the non- verbal communication between the doctor and patient.Later in the year 1969 Ekman. P. Matsumoto D.R and Freisen W.V introduced the concept of micro- expressions. He was examining the video of his patient who was suffering depression and Ekman observed the micro- expression of his patients who had tried to commit suicide. After that many studies were conducted by the Ekman and group
