:: COMPARE ::
The short answer
Same axis, opposite poles. Hyperphantasia is imagery so vivid it can blur with perception. Neither is a diagnosis; both are ends of one distribution that most people sit in the middle of.
Side by side
| Aspect | Aphantasia | Hyperphantasia |
|---|---|---|
| Voluntary imagery | None | Near-perceptual |
| A diagnosis | No | No |
| Roughly | 0.8% of people | Around 3% in the literature |
| Affects memory | Not the facts | Not the facts |
What each one means
The absence of voluntary visual mental imagery — asked to picture an apple, the mind stays blank. It is a variation in imagery rather than an illness, though studies have found it often extends to the other senses and comes with less vivid autobiographical memory.
Full definition of Aphantasia →The contrast above sets out how Hyperphantasia differs from Aphantasia on the points that actually matter.