There are several ways for an observer, scientist, or other individual to control behavior. The one route, emphasized by Lewin (1931) under the rubric of Galilean thinking, is to investigate or examine the multiplicity of perspectives offered by the individual being studied, drawing on information about perceptions, motives, needs, chronic orientations, and so forth in trying to predict (and thereby explain) the individual case. Thus, to get a handle on the individual case, the observer should draw on pertinent aspects of theoretical wisdom and establish the combination of forces that influences the person at any given moment.