Many demonstrations of perceptual effects. Research on recognition of pictures. On making pictures of different kinds of objects and events. Recent studies on 3-5 year olds. Vision and touch as they are used to gain information about shape.
Vision is distal, and pictures are visual, because pictures show what is distal.
Can't unify, to get overall impression of complex shapes and spaces. Can't recall complex spatial patterns. Katz noted - palpation is distal. A moving fingertip gives more spatial information than an immobile one feeling twists and turns of a raised line. Passively guided contacts are better than actively moving contacts.