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.