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PART TWO THE INFORMATION FOR VISUAL PERCEPTION
FOUR THE RELATIONSHIP BETWEEN STIMULATION AND
STIMULUS INFORMATION 		47
The Distinction Between Luminous and Illuminated Bodies 47
The Distinction Between Radiation and Illumination 48
The Distinction Between Radiant Light and Ambient Light 50
The Structuring of Ambient Light 51
Stimulation and Stimulus Information 52
Do We Ever See Light as Such? 54
The Concept of the Stimulus as an Application of Energy 55
Ambient Energy as Available Stimulation 57
The Orthodox Theory of the Retinal Image 58
A Demonstration That the Retinal Image Is Not Necessary for Vision 61
The Concept of Optical Information 62
Summary 63
FIVE THE AMBIENT OPTIC ARRAY 65
How Is Ambient Light Structured? Preliminary Considerations 66
The Laws of Natural Perspective: The Intercept Angle 69
Optical Structure with a Moving Point of Observation 72
The Change Between Hidden and Unhidden Surfaces: Covering Edges 76
How Is Ambient Light Structured? A Theory 86
Variants and Invariants with a Moving Source of Illumination 88
Ripples and Waves on Water: A Special Case 92
Summary 92
SIX EVENTS AND THE INFORMATION FOR PERCEIVING EVENTS 93
A Classification of Terrestrial Events 94
The Optical Information for Perceiving Events 102
The Causation of Events 109
Summary 110
SEVEN THE OPTICAL INFORMATION FOR SELF-PERCEPTION 111
The Specifying of the Self by the Field of View 111
The Specifying of Limb Movements 120
The Specifying of Locomotion 121
Summary 126

-viii-

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Publication Information: Book Title: The Ecological Approach to Visual Perception. Contributors: James J. Gibson - author. Publisher: Lawrence Erlbaum Associates. Place of Publication: Hillsdale, NJ. Publication Year: 1986. Page Number: viii.
    
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