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Sensory, Attentional And Perceptual Processes
What do you understand by ‘after images’? Briefly explain.
The effect of a visual stimulus persists for some time even after the removal of that stimulus from the visual field. This effect is called ‘after image’. After images are positive and negative. Positive after images resemble the original stimulus in terms of hue, saturation and brightness. They usually occur after a brief intense stimulation of dark adapted eyes. On the other hand, negative after images appear in complementary colours. These images appear when a person stares at the patch of a particular colour for at least 30 seconds, and then transfers the gaze to a neutral background. For example - if the person looks at the blue colour the negative after image will appear in yellow.
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What is meant by light and dark adaptation? How do they take place?
What is colour vision and what are the dimensions of colour?
How does auditory sensation take place?
Define attention. Explain its properties.
State the determinants of selective attention. How does selective attention differ from sustained attention?
What is the main proposition of Gestalt phychologists with respect to perception of the visual field?
How does perception of space take place?
What are the monocular cues of depth perception? Explain the role of binocular cues in the perception of depth.
Why do illusions occur?
Which part of our body collect information from the external world as well as from our own body?
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