Think this might be you?

Start with one question

Close your eyes and picture an apple. Pay attention to what happens. For most people, an image arrives — sometimes a vivid red one, sometimes a vague shape, sometimes a fleeting impression. For some of us, nothing arrives. We know what an apple looks like as a fact; we cannot see one.

If that second description is what just happened, or something close to it, you may have aphantasia. It is more common than people realised — between 2% and 5% of the population, depending on the cut-off. You are not alone, and you are not broken.

More signals worth recognising

None of the below is diagnostic on its own. Together they form a pattern that, if you see yourself in most of it, is worth following up with the questionnaires.

You might have aphantasia if…

• You cannot picture the face of someone close to you when you try.
• Sheep-counting never worked because you could not see the sheep.
• “Imagine a warm beach” exercises in meditation apps have always felt pointless.
• You read a novel for the ideas, the rhythm, the voice — not for the pictures other people say books put in their heads.
• You can navigate a familiar city perfectly well, but you cannot “see” it when you are not there.

You might have SDAM if…

• You can tell someone the facts of your life clearly but cannot replay the moments.
• You have always relied on photos, journals, or a partner to “remember for” you.
• You recognise yourself in your own memories the way you recognise an acquaintance — from a distance.
• Other people seem to miss past events much more than you do, and sometimes mistake your equanimity for not caring.
• Forgiveness comes easily, sometimes worryingly easily — because the offence does not replay.

The validated tools

If the patterns above feel like you, the next step is a questionnaire. Both are free, both take ten minutes, neither diagnoses.

• The VVIQ (Vividness of Visual Imagery Questionnaire) — sixteen items. A consistently low score is the population the aphantasia research is about. See the glossary entry for what the test is measuring and why it looks the way it does.
• The SAM (Survey of Autobiographical Memory) — twenty-six items across four subscales. A low Episodic score with normal Semantic scores is the SDAM signature. See the glossary entry.

Links to both questionnaires live on the resources page. We deliberately do not embed the tests here — they were designed to stand alone, and screening yourself against someone else’s re-implementation is worse than taking the real thing.

What the tests cannot tell you

They cannot tell you whether the picture in your head is the same as the picture in someone else’s head. Nobody can. Research into imagery is, in part, research into a private experience that each of us verbalises in our own way. The questionnaires are useful because the patterns of answers map onto patterns in brain imaging and behaviour — not because any one answer is diagnostic.

If it turns out this is you

Go and read the cornerstone guide, and then the newly diagnosed page. Those two together are designed to carry you through the first week or so of “oh, that is what has been going on”.

If it turns out this is not you

Also useful. The self-check you just ran — the apple, the face, the photo — is a small act of attention to your own mind that most people do not get to do. Whatever came up, you know something about yourself you did not know an hour ago. That is not a small thing.