In this case, the mapping between number and color is constant. For this person, the number 3 generally appears red, while the number 7 generally appears green. One way to test whether someone actually has this form of synesthesia is to have the person hunt for shapes hidden in an array of similar-looking numbers. For example, the following array contains 5s organized into a shape among 2s. What results would you expect when comparing participants with grapheme-color synesthesia against controls?

The result would be that the individuals with grapheme-color synesthesia should be considerably faster and more accurate than controls at detecting the hidden shape.

Explanation:

Given the fact that individuals with grapheme-color synesthesia naturally associate shapes of numbers and letters with colors, it would automatically be easy for them to recognize the distinction in shapes as a different shape would appear to them as a different color. Hence, when a person with grapheme-color synesthesia would be asked to find a particular shape alongside other controls having assigned the same task, the person with grapheme-color synesthesia would be the fastest to complete the task.

a

Explanation:

the answer is a