Qualia · about 4 minutes
The Voice in Your Head
You were just asked whether you can see a picture of an apple. Now the other one: as you read this sentence, is there a voice?
Not a sound in your ears. The thing people mean when they say they were talking to themselves. Some people have it constantly, in an accent, with a tone. Some people, it turns out, have never had it once.
Three small probes. Do each one before reading its answer -- they only work once, and answering honestly matters more than answering impressively.
Probe one
Read this line silently, without moving your lips: “The kettle has boiled again.”
Did you hear it -- a voice, with a pace and a tone -- or did the meaning simply arrive?
Probe two
How many windows are there in the home you grew up in? Actually work it out -- take fifteen seconds.
Now: how did you do that?
Probe three
Last one, and the honest one. In an ordinary hour of your ordinary life -- walking, washing up, waiting -- how much of the time is there language running?
Whatever you answered, here is the surprise
The beeper study
Almost everything people believe about their own inner speech comes from asking them afterwards, which is exactly the method this museum keeps warning you about. Russell Hurlburt spent decades doing it properly instead. He gives people a beeper that goes off at random through the day, and the moment it sounds they freeze and write down what was in their experience at that instant -- before any of the tidying-up happens. Then he interviews them about it, at length, sceptically.
Two findings matter here. First, inner speech turns up in something like a quarter of sampled moments -- not the constant narration most people confidently report. Second, and more awkward: people are bad at describing their own inner experience. Participants who arrive certain they think in constant sentences often find, sample by sample, that they mostly don't; the belief survives because nothing in ordinary life ever checks it.
Hurlburt's method has real critics -- it relies on introspection, training, and a skilled interviewer, and you cannot fully separate the finding from the interview. But it remains one of the few honest attempts to look, and what it found is not what anybody expected.
And some people have none
At the far end sits the same story as the apple. A minority of people report no inner voice at all -- no monologue, no rehearsing, no narration -- and, like aphantasia, they typically discover this in adulthood and are met with disbelief. Researchers have recently started calling it anendophasia, and early work suggests it comes with small, specific differences on tasks where quietly repeating something to yourself helps, such as holding a list in mind.
Small differences. Not deficits -- these are people running ordinary lives, holding down ordinary jobs, and reasoning perfectly well without the thing everyone else assumes is required for thinking at all.
What the two rooms add up to
Take the apple and the voice together and something uncomfortable falls out. The format of your thinking is not universal, and you have no way of perceiving that from the inside.
You have been assuming, all your life and entirely reasonably, that when someone says "I was picturing it" or "I said to myself" they are reporting an experience like yours. For a few per cent of the people you know, they aren't -- and the wording gives nothing away, because a metaphor and a literal description are the same sentence.
Which is the inverted spectrum from Exhibit № 10 stepping out of philosophy and into an actual survey. The lesson is not that everyone is unknowable. It is more useful than that: differences in inner life are real, are sometimes large, and can be found -- but only if somebody thinks to ask a question plain enough to catch them. Nobody asked about the apple until 2015. Nobody had a word for the missing voice until the other week.
It is worth wondering, gently, what you are currently assuming about everybody in your life on precisely this much evidence.
Take it further
Russell Hurlburt's Investigating Pristine Inner Experience lays out Descriptive Experience Sampling and is unusually candid about its own weaknesses; his book with Eric Schwitzgebel, Describing Inner Experience?, is a genuine argument between a believer and a sceptic printed side by side, which is a lovely format and rare. Charles Fernyhough's The Voices Within is the readable survey and is very good on inner speech in children, in reading, and in people who hear voices. The term anendophasia is new enough that the literature is still small.
One honest note about our three probes: asking you to notice your inner speech is very close to asking you to produce some. The act of checking changes the thing being checked, which is the oldest problem in introspection and one this room cannot escape -- only admit to.