Introduction Facial expression is the movement of mimetic musculature that is found in the face. It involves the movements innervated by the VIIth cranial nerve, which comes from the brainstem; this is between the pons and medulla in one’s inner head. The greatest research that social scientists were concerned about is the effect that emotion has on facial expression. The facial feedback hypothesis is one of the theories that have been developed to look into the effect that facial expression has on human emotions (Bernstein, Clarke-Stewart, Penner, Roy & Wickens, 2000). This paper looks into the Facial feedback hypothesis. Facial Feedback Hypothesis The facial feedback hypothesis is that “skeletal muscle feedback from facial expressions plays a causal role in regulating emotional experience and behavior”, this is to means that one’s emotions are affected by facial movements and contractions of facial muscles. This means that if someone goes to a movie and all along he is smiling, then he is more likely to perceive the movie as more enjoyable than one who just follows the movie without any facial expressions. In a layman’s language is that in facial expressions induced emotions the contraction of the face results in an emotion whether good or bad. The theory hypothesizes that facial muscles evoke or magnify emotions (Strack, Martin & Stepper, 1998). Review Literature on the Facial Feedback Hypothesis Matsumoto (1987), examines the extent to which one face can express self-reported mood; he builds from the general brief brought forward by other scholars like Laird (1984) who observed that human facial expressions are consistent and can be used to accurately (to a large extent) measure the self mood of an individual. Human moods can be affected by the environment that he or she lives and the outcome of the situation that one is going through is seen in the facial expressions. The expressions of the face are resultant of the outside environment that affect the person concerned; the face will change if the body has been aroused, either by a negative or an appearing thing; the point of concern is, what is the extent that the face gets aroused? What is the extent that the facial muscle contraction affects one’s emotions? The above hypothesis is true, but the question is how to measure the extent that the face can measure the self-reported mood; one of the methods developed to measure is the box-score approach; it though cannot be relied on to measure the magnitude of the effect. By the use of meta-analytic techniques, it shows that a certain change of mood can only change the facial expression with a little effect that cannot be relied upon to show the inner mood of a person. This shows that the effect of facial feedback on emotional experience is less than convincing. The early developers of the theory conducted numerous researches with human beings, the theory is based on the view of Charles Darwin that there is a connection between facial contraction and the emotions that one has. The researchers researched human beings with severely impaired emotional functioning as well as people and it was developed over a century after the death of Charles Darwin. Darwin claimed that facial expressions are the final resu