Orientation and form

For researchers in perception, cognitive and physiological psychologists, visual research workers, and others. Chapter I. The problem --Chapter II. Retinal orientation versus assignment of directions --Experimental evidence --Symmetry --The assignment of directions --Conclusions --Chapter III. The assignment of direction factor --The effect of degree of orientation change on shape --the perception of tactually disoriented figures --why does recognition occur at all when directions are incorrectly assigned? --Chapter IV. The retinal factor --The basis of perceptual change with change of retinal orientation --The conditions under which a retinal effect occurs --Is the retinal factor based on change of retinal orientation? --Recognition as a function of degree of retinal disorientation --Chapter V. Discussion --Theories about orientation of form --Anisotropy and form perception --Retinal change and change of assigned directions combined --The "purpose" of change of appearance in form with change of orientation --The issue of adaptation to a disoriented retinal image --Form orientation in children --Chapter VI. Implications for a theory of form perception --Implications for the process of recognition --Chapter VII. Summary and conclusions.