Distinguish between internal and external perception. What is the purpose of apperception?
The study going on in physics and physiology concentrated on the external perception. They focused on the observation of the observer. In astronomy the tracking of the stars is the observation and the focus of observation is the stars. In chemistry the laboratory work including, test tubes making of chemicals among others requires focus on these items and not on the observer.
In internal perception the focus is the observer .Whatever, he or she feels or experiences is noted down. In internal perception the feelings, responses, and experiences are counted.
Just like in external perception the raw data is provided by the observer, here the object of observation is the observer. The raw data obtained are his or her personal experience. Apperception is the building up of higher cognitive processes, from simpler processes. The new product formed has different qualities from the elements building it.