ABSTRACT
Contemporary psychology makes use of three basic techniques in its study of the personality of the child. First is what may be termed scientifically ordered observation, which involves the observation of the particular characteristics of any one of our students, but only in a scientifically ordered way. All the different methods of psychological experimentation may be easily broken down into three basic groups, the first consisting of methods of stimulation, in which the force, composition, and interdependence of the elements of a stimulus are varied to determine particular relations and connections between an external cause and the reactions induced by it. Second, methods of expression, which are intended for the study of those physical manifestations, such as changes in pulse rate, respiration, facial expression, and speech through which various mental states are manifested. Third, methods of reaction, in which previously conditioned reactions are induced upon some signal.
