Aphantasia Test

Close your eyes and picture a red square.
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Really close your eyes. Put a red square right there in your head.
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What did you actually see?
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Most people describe something. Maybe crisp, maybe fuzzy, maybe just a vague impression. But something showed up.
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People with aphantasia will say nothing showed up. And then they'll rate themselves a 5 or 6 anyway.
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Not because they're lying. Because they've spent their whole life hearing the word "imagine" and assuming it meant the same thing for everyone. They thought "picture a red square" meant think about a red square. Know it's red. Know it has four sides. Recognize one if you see it.
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They didn't know other people were actually seeing something.
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This is not about intelligence, memory, or creativity. It is about one specific thing: can you see an image in your head when you close your eyes?
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For roughly 1 in 7 people, the answer is no. And almost none of them know it.
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If you just figured out you might have aphantasia, or if you're thinking about someone this might explain,  I wrote a bit more about it here.