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DEFICITS IN PERCEPTION
Prepared by: Magadia, Kimberly B.
Learning Objectives:
To understand
agnosias and ataxias
1
To discuss color
blindness briefly
2
3
4
To explain evidence
for separate systems
To determine the importance of
perception practically
AGNOSIA
- the inability to process
sensory information
Types of Visual Agnosia
Visual-object Agnosia
- can sense all parts of the visual field but the
objects they see does not mean to them
Simultagnosia
- unable to pay attention to more than one
object at a time
Prosopagnosia
- severe impairment in their ability to
recognize human faces including their own
OPTIC ATAXIA
- the inability to use visual
system to guide movements
AHA!
Extreme specificity of deficits leads
researchers about modular processes.
1 particular task = 1 separate system
Evidence for Separate Systems
Prosopagnosia
- Inability to recognize
faces but can
recognize objects
Associative Agnosia
- Difficulty with
recognizing objects
but can recognize
faces
Color Blindness
- it is another type of perceptual deficit and
often happens when someone cannot distinguish
between certain colors
2 types
 Monochromacy - no color vision at all
 Dichromacy – difficulty in determining colors
between greens and reds, and occasionally
blue
Importance of Understanding Perception
 It improves individual’s
chances for survival
and safety.
 It helps in designing
devices to restore
perception to those
who have lost some (or
all) and also to provide
treatments for other
perceptual problems.
Thank you

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Deficits in perception

  • 1. DEFICITS IN PERCEPTION Prepared by: Magadia, Kimberly B.
  • 2. Learning Objectives: To understand agnosias and ataxias 1 To discuss color blindness briefly 2 3 4 To explain evidence for separate systems To determine the importance of perception practically
  • 3. AGNOSIA - the inability to process sensory information
  • 4. Types of Visual Agnosia Visual-object Agnosia - can sense all parts of the visual field but the objects they see does not mean to them Simultagnosia - unable to pay attention to more than one object at a time Prosopagnosia - severe impairment in their ability to recognize human faces including their own
  • 5. OPTIC ATAXIA - the inability to use visual system to guide movements
  • 6. AHA! Extreme specificity of deficits leads researchers about modular processes. 1 particular task = 1 separate system
  • 7. Evidence for Separate Systems Prosopagnosia - Inability to recognize faces but can recognize objects Associative Agnosia - Difficulty with recognizing objects but can recognize faces
  • 8. Color Blindness - it is another type of perceptual deficit and often happens when someone cannot distinguish between certain colors 2 types  Monochromacy - no color vision at all  Dichromacy – difficulty in determining colors between greens and reds, and occasionally blue
  • 9.
  • 10. Importance of Understanding Perception  It improves individual’s chances for survival and safety.  It helps in designing devices to restore perception to those who have lost some (or all) and also to provide treatments for other perceptual problems.