Mary Whiton Calkins was a famous psychologist who is well-known for her research in self-psychology. Calkins described the conscious self is fundamental to understand other forms of psychology. She also mentioned that self is the center of all types of relationships we make to ourselves and the physical world. Many psychologist have argued whether self has a body or it is different from the body. In addition, Calkins also considered self as an essential part of our body but she believed self does not consist in the body. The roots of Calkins’s self-psychology is a form of introspectionist psychology which examines someone 's mental experience. Many psychologist wants to explain self with some kind of experiment. However, Calkins argued that