Outline: Mental Imagery. When do we use Imagery? Subcomponents of Imagery . Relation to perception Types of Imagery: Spatial vs. Visual Oral Presentations: Info. Mental Imagery. Which one is bigger, a tennis ball or a 100-watt light bulb? Do monkey’s ears protrude from their head?
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Are they the same shape?Mental Rotation
Slowest RTMental Rotation: What is the nature of mental imagery?
RT: fast slow
The greater the angle the letter had to be rotated to get back to
upright…the longer it took subjects to judge whether they were
mirror reversed or not.
Neuroimaging Evidence: Similar Brain Areas Activated by Imagery and Perception
correspondence between perception and Imagery
- Primary visual cortex has a retinotopic map, that is,
- peripheral visual field is represented in anterior part of BA17
- fovea is represented in posterior part of BA17
Task: Letter Imagery
Independent Variable: Size of image
Result: Image of small letters activates more posterior parts of primary visual cortex than image large letters.