Part 1 of Essay
and visual sensation are both interactive processes, although there is a significant difference between the two processes. Sensation is defined as the stimulation of sense organs Visual sensation is a physiological process which means that it is the same for everyone. We absorb energy such as electro magnetic energy (li ....

Part 2 of Essay
.... of organizing, interpreting, and selectively extracting sensory information . is left to the individual person to make up their own mind. Perceptual organisation occurs when one groups the basic elements of the sensory world into the coherant objects that one perceives. Perception is therefore a process through which the brain makes sense of incoming stimuli. The process of perception is an interactive yet separate process from sensation, however, it is sometimes difficult to separate the two processe ....