Aphantasia is a phenomenon in which people are unable to visualize imagery. While most people are able to conjure an image of a scene or face in their minds, people with aphantasia cannot.
Aphantasia is believed to be rare, affecting an estimated 1% to 3% of the population. If you were to ask a person with aphantasia to imagine something, they could likely describe the object, explain the concept, and rattle off facts that they know about the object. But they would not be able to experience any mental image accompanying this knowledge.
The inability to voluntarily form mental images was first described in medical literature by Francis Galton in 1880. People with this condition experience difficulty picturing scenes or objects in their minds, a phenomenon known as mind-blindness.
Aphantasia is rare, but scientists have identified two types of the disorder, including acquired aphantasia, which can occur after a brain injury or occasionally after periods of depression or psychosis, and congenital aphantasia, which is present at birth.
Research on the condition is still scarce. Hyperphantasia, the condition of having extremely vivid mental imagery, is the opposite of aphantasia.
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Test: Can You Visualize This In Your Mind? APHANTASIA Explained
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