what is psychology? psychology is the scientific study if human behavior and mental process. according to good theory" psychology is the field of science dedicated to understanding human motivations, behavior, and the mind. It encompasses a wide variety of subfields, and psychologists may engage in a number of scientific practices. according to Wikia "psychology is the science of the behavior and mind including conscious and unconscious phenomena including thoughts. the word psychology comes from 2 Greek words psyche soul and logia mean the study of. in 1890, william james defined psychology as "the science of mental life, both of its phenomena and their conditions". This definition enjoyed widespread currency for decades. However, this meaning was contested, notably by radical behaviorists such as watson , who in his 1913 manifesto defined the discipline of psychology as the acquisition of information useful to the contr...