It's very interesting how the ability to recognize faces/see faces in everything can affect how we perceive the world. Question is, do people with facial agnosia "see" the same things in ambiguous images? I think that would be an interesting avenue to explore. From the last picture you show it seems obvious that at least some forms of the illusion are effective for those with facial agnosia. I think the double image is also similar to the Penrose triangle and stairs, where the eye follows the lines of the object and recognize them but the impossibility of their progression confuses the mind, while in the ambiguous image changing the center of focus or orientation leads to different images.
It's very interesting how the ability to recognize faces/see faces in everything can affect how we perceive the world. Question is, do people with facial agnosia "see" the same things in ambiguous images? I think that would be an interesting avenue to explore. From the last picture you show it seems obvious that at least some forms of the illusion are effective for those with facial agnosia. I think the double image is also similar to the Penrose triangle and stairs, where the eye follows the lines of the object and recognize them but the impossibility of their progression confuses the mind, while in the ambiguous image changing the center of focus or orientation leads to different images.
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