Emotions can be expressed verbally, with facial expressions, and with gestures. Darwin's hypothesis concerning emotion stated that the way emotions are expressed is universal, and therefore independent of culture. Ekman and Friesen conducted a study to test this theory. The study included introducing basic emotions found in the western world and introduced them to different cultures around the world (Japan, Brazil, Argentina, Chile, and the United States). Across the 5 cultures they were all able to accurately determine the emotion (success rates of 70–90%). They also introduced these selected emotions to an isolated community in Papua New Guinea that was not in contact with the western world. The results revealed that both the other cultures and isolated communities could effectively match and detect the emotional meaning of the different faces. This became evidence that emotions are expressed facially in the same way across the world.
