Object Recognition 2 Flashcards
What is agnosia?
The failure of knowing
What is visual agnosia?
Can’t recognize objects visually but can recognize them using other senses
What is associative agnosia?
When perception occurs without recognition. They can perceive shapes/forms, but have difficulty associating them into recognizable objects
What test do those with associative agnosia have trouble with?
Match-by-function test
What is apperceptive agnosia?
Failure of perceptual processing. They have trouble with object constancy, basic shapes and forms?
What test do those with apperceptive agnosia have trouble with?
Unusual views/shadows test
What is integrative agnosia?
Deficit in integrating parts of an object into a coherent whole
What is category specific agnosia?
When there are selective deficits for certain categories. Ex: Living vs Non-living or Fruits vs vegetables
What did fMRI tell us about face perception?
There is a brain region that has preference for faces mainly fusiform face area (FFA) but they also saw reaction from the occipital face area
What did single cell recording tell us about facial recognition?
There were face-selective responses in IT and STS.
What did ERP tell us about face perception?
N170 response to specific faces in the posterior aspect of the brain
What did TMS tell us about face perception?
TMS to Occipital Face Area –> face-specific task impairment (involved in facial recognition)
What did ECoG tell us about face perception?
Stimulation to FFA –> face-specific perceptual distortions
What is the face inversion effect?
It is much harder to recognize faces upside-down but is not the case with other objects
What does the Thatcher Illusion illustrate?
Wholistic processing with faces and how it’s harder to recognize when features have changed when the face is upside down
