linguistic:translation, quality:corruption
Gibson

It is Gibson's emphasis that the foundation for perception is ambient, ecologically available information – as opposed to peripheral or internal sensations – that makes Gibson's perspective unique in perceptual science in particular and cognitive science in general. The aphorism: "Ask not what's inside your head, but what your head's inside of" captures that idea. Gibson's theory of perception is information-based rather than sensation-based and to that extent, an analysis of the environment (in terms of affordances), and the concomitant specificational information that the organism detects about such affordances, is central to the ecological approach to perception. Throughout the 1970s and up until his death in 1979, Gibson increased his focus on the environment through development of the theory of affordances - the real, perceivable opportunities for action in the environment, that are specified by ecological information.