ABSTRACT
Darwin viewed emotion as part of the biological apparatus of humans (1872). He saw emotions as a set of action patterns that enable children to behave in specific ways. For example, anger is not only a set of expressions but includes vocal growling and gross motor patterns, which enable the child to try to overcome a frustrating event. Darwin and those after him elaborated a system of scoring facial expression using the neuromusculature of the face. This coding system allows developmental investigators to map out emotion.
