Although unable to report the width of a block in front of her, a woman identified as d. f. could grasp the block with just the right finger-thumb distance. her experience best illustratesa) blindsight. b) the cocktail party effect. c) selective attention. d) the popout phenomenon.

a) blindsight.

Explanation:

Better known as Blind Vision, Cortical Blindness, or Blindsight, this type of blindness is a condition of the brain, not the eye. Deficiency, which results from brain and visual system damage, affects the part of the brain responsible for conscious vision (occipital cortex).

Individuals with this problem have the ability to look at objects and locate them in their environment, even though they cannot consciously identify it. If we ask a patient in this situation where the ball is, he will be able to look at the object, sometimes he may even point at it, but he does not know what he is doing, for example. A patient with Blind Vision, crossing a corridor, can avoid all obstacles, but he is not aware that the obstacles were there. The individual is also unaware that he needed to avoid such obstacles on the way.

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