Human echolocation - Daniel Kish, "Batman"

Human echolocation - Daniel Kish, "Batman" - Seeing without sight Daniel Kish is famous for his abilities to see using sound, despite being totally blind. The notion of multimodal perception has long been promoted by Gibsonian scientists and is understood via the field known as ecological psychology and direct perception theory. That we can see - and hear - the shape of objects without using the eyes is understandable using the framework of invariants and invariant information - the same information across different senses: The senses are NOT the cause...the information is! (The senses are only the material cause, but the information is the formal cause, in Aristotelian terms). Sensations are merely side effects - what is perceived are the "affordances" of the world. See: https://www.youtube.com/watch?v=_bf3lQ95ghk&list=PLtoX6L88vjke4vpnevC7Gf9BWxNx3xbdU&index=5 https://www.youtube.com/watch?v=-NpMxKdImKw&index=4&list=PLtoX6L88vjke4vpnevC7Gf9BWxNx3xbdU https://www.youtube.com/watch?v=YxnVJgmykMw&index=1&list=PLtoX6L88vjke4vpnevC7Gf9BWxNx3xbdU for John Kennedy's studies of a BLIND painter, see here: https://www.youtube.com/watch?v=X8iCJrh5uto&list=UUQY-IFNQwdmd-70pL4uUJ0g