This is a laboratory manual of fourteen psychological experiments designed to acquaint the undergraduate and graduate psychology student with methods of experimentally harnessing and examining dynamic personality processes. It leans heavily on the experiments and theories of Kurt Lewin and his co-workers, but acknowledgment is also made to the clinical investigations of Freud. Some of the experiments deal with level of aspiration, aggressive and 'regressive' reactions to frustration, substitution or displacement phenomena, 'repression', and satiation effects. The significance of the appearance of this manual is mainly historical and educational, for it expresses, along with the great increase in clinical psychology courses in our colleges and universities, the heightened academic recognition that the basic subject matter and teaching matter of psychology is the complexly motivated human being.