The scientific study of the relations between mental and physical processes is a definition of wundt's psychology cranioscopy psychophysics weber's law fechner's law

The scientific study of the relations between mental and physical processes is a definition of psychophysics. Psychophysics is  a study that studies quantitative relations between psychological events and physical events. The study was established by the German scientist and philosopher Gustav Theodor Fechner.

an informal structure in a bureaucracy would be something like so-called "office politics". where there's a formal structure set up for the organization, but then an informal subculture as well that has a way of organizing the bureaucracy further. this can be positive because it sets up an added degree of organization, albeit informal, within the bureaucracy.