This indicates that he holds a "ecological" view on perceptual development.
Perception is the capacity of people to procure data from the world through their faculties. Perceptual development alludes to the improvement of these faculties. Gibson's hypothesis of perception is data based as opposed to sensation-based and to that degree, an investigation of environment (in terms of affordances), and the accompanying particular data that the living being recognizes about such affordances, is key to the ecological approach to perception.