Page 7 - Sensory, Attentional and Perceptual Processes

1. Relative Size
2. Interposition or Overlapping
3. Aerial Perspective

4. Light and Shade
5. Relative Height
6. Texture Gradient
7. Motion Parallax
Some important BINOCULAR CUES TO DEPTH PERCEPTION in three dimensional
space are provided by both the eyes.
 Three of them are:

1. Retinal or Binocular Disparity
2. Convergence
3. Accomodation

PERCEPTUAL CONSTANCIES
The sensory information that we receive from our environment constantly changes as
we move around.

Yet we form a stable perception of an object seen from any position and in any intensity
of light.
Perception of the objects as relatively stable in spite of changes in the stimulation of
sensory receptors is called perceptual constancy.
Here we will examine three types of perceptual constancies that we commonly
experience in our visual domain.
1. Size Constancy
2. Shape Constancy

3. Brightness Constancy

ILLUSIONS
Our perceptions are not always veridical. Sometime we fail to interpret the sensory
information correctly. This results in a mismatch between the physical stimuli andits
perception. These misperceptions resulting from misinterpretation of information
received by our sensory organs are generally known as illusions.

Some of the vision illusions are
1. Geometrical Illusions such as Muller-Lyer Illusion and Vertical-Horizontal Ilusions
2. Apparent-movement Illusion – Phi-phenomenon.