“The life space… includes both the person and his psychological environment. The task of explaining behavior then becomes identical with (1) finding a scientific representation of the life space (LSp) and (2) determining the function (F) which links the behavior to the life space. This function (F) is what one usually calls a law… The novelist who tells the story behind the behavior and development of an individual gives us detailed data about his parents, his siblings, his character, his intelligence, his occupation, his friends, his status. He gives us these data in their specific interrelation, that is, as part of a total situation. Psychology has to fulfill the same task with scientific instead of poetic means…. The method should be analytical in that the different factors which influence behavior have to be specifically distinguished. In science, these data have also to be represented in their particular setting within the specific situation. A totality of coexisting facts which are conceived of as mutually interdependent is called a field. Psychology has to view the life space, including the person and his environment, as one field.”

Kurt Lewin (1946) &quot;Behavior and development as a function of the total situation&quot;. In K. Lewin (Ed.) Field theory in social science (pp. 238-305). New York: Harper &amp; Row. p. 240 as cited in: John F. Kihlstrom (2013) &quot; The Person-Situation Interaction&quot; http://ist-socrates.berkeley.edu/~kihlstrm/PxSInteraction.htm <br class="br">1940s