Sensation would rather be the early part of perception looking at the receptors for e. g. in the eye or ear. Perception itself is then more of the cognitive aspect of it. ,9870,4/4 4:/013070,14:70 talking about what you can feel, what you can smell, what you can taste and see, then real is simply electrical signals interpreted by your brain. so whatever we learn about the world is somehow transformed into neural signals and somehow processed by the brain. Philosophy being one of the important sources where psychology originally comes from. Psychophysics = set of tools and methods developed in the 19th century [one of the major scientific tools you can use in psychology] Psychophysics = basically trying to describe a phenomenon in psychology in terms of mathematical things [in a very accurate way] For the movie matrix -> the idea originally comes from plato.