What is the difference between inner psychophysics and outer psychophysics? Which was Fechner forced to focus on? Why?
There is a reason why one studies outer and inner psychophysics. Going by its nature psychosis can be divided into two types namely, outer and inner psychophysics. The outer psychophysics can be used for measurement as it is the physical entity, while the psychical or inner psycho physics relies on the outer psychophysics for measurements.
This difference is based upon, which aspect of body is being taken into consideration. If one is considering the outer aspects of the body then one would be talking about outer psychosis. The inner psychophysics refers to the link between sensation and the accompanying brain and nerve excitation.
Inner psychophysics, bridges the gap between the mind and the outer psychophysics. Outer psychophysics borrows aids from physics, and inner psychophysics borrows aids from anatomy and physiology.
Fechner emphasized more on the outer psychophysics. In his days, it was not possible to study the physiological processes, as those were the days when sophisticated technology had not yet developed.