The bottom outer corner of the jacket is split and the flaps foxed, as is the fore-edge. The body of the book is in excellent condition: no inner markings and solidly bound. Jules Davidoff "succesfully presents his material, with many illustrations, to show how pwrcveptual differences, where observers are faced with similar visual imputs, depend on short term, long term, developmental, and ambiguous aspects" (from the front flap)