Bill and Ben recently sustained damage to the occipital cortex and are experiencing blindness. Both are asked to identify whether lines presented on a computer monitor are either horizontal or vertical. Bill reports that he cannot see anything and he guesses the correct orientation of the line slightly less than 50% of the time (random chance). Ben reports reports that he cannot see anything but he guesses the correct orientation of the line with 70% accuracy. Which of the following statements is most accurate? Question 47 options: Bill and Ben both have cortical blindness and Ben is experiencing blindsight. Bill and Ben both have a blindsight and Ben is experiencing akinotopsia. Bill and Ben both have a scotoma and Bill is experiencing blindsight. Bill and Ben both have a blindsight and Bill is experiencing cortical blindness.
Question
Bill and Ben recently sustained damage to the occipital cortex and are experiencing blindness. Both are asked to identify whether lines presented on a computer monitor are either horizontal or vertical. Bill reports that he cannot see anything and he guesses the correct orientation of the line slightly less than 50% of the time (random chance). Ben reports reports that he cannot see anything but he guesses the correct orientation of the line with 70% accuracy. Which of the following statements is most accurate?
Question 47 options:
Bill and Ben both have cortical blindness and Ben is experiencing blindsight.
Bill and Ben both have a blindsight and Ben is experiencing akinotopsia.
Bill and Ben both have a scotoma and Bill is experiencing blindsight.
Bill and Ben both have a blindsight and Bill is experiencing cortical blindness.
Solution
The most accurate statement is: "Bill and Ben both have cortical blindness and Ben is experiencing blindsight."
Here's why:
Cortical blindness is a visual impairment that occurs when the primary visual cortex (located in the occipital lobe) is damaged. Both Bill and Ben have damage to their occipital cortex and are experiencing blindness, which suggests they have cortical blindness.
Blindsight is a phenomenon in which people who are perceptually blind in a certain area of their visual field demonstrate some response to visual stimuli. Ben, despite reporting that he cannot see anything, is able to guess the correct orientation of the line with 70% accuracy. This suggests that he is experiencing blindsight.
The other terms mentioned in the options, akinotopsia and scotoma, do not apply to Bill and Ben's symptoms. Akinotopsia is a condition in which the individual cannot perceive motion and scotoma is a partial loss of vision or blind spot in an otherwise normal visual field. Neither of these conditions are described in the scenario.
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