The Minds We Assume Everyone Has: Aphantasia, Inner Speech and Memory

Close your eyes and picture an apple.

Not the word apple, or a list of facts about apples. Try to produce the object itself: its colour, its shape, the curve around the stem. Turn it slightly. Imagine a bite taken from one side.

What happened? Perhaps an apple appeared with almost photographic clarity. Perhaps you saw something less stable: a patch of colour, an outline that vanished when you tried to examine it, a suggestion rather than a picture. Perhaps nothing appeared at all. You still knew what an apple looked like. You could describe one, recognise one and probably draw a serviceable version, but there was no internal object to inspect.

Questions of this kind often produce an unusual disagreement. People are not merely reporting different experiences; they are uncertain whether they have understood the instruction in the same way. One person says they can see the apple and assumes everyone else can too. Another insists that nobody can literally see an imaginary object and assumes vivid visualisers are speaking metaphorically.

The disagreement belongs to a broader and still imperfectly mapped variation in inner experience, including aphantasia, differences in inner speech and markedly different forms of autobiographical memory. People can speak, plan, remember and solve the same problems while experiencing those processes in ways that barely resemble one another.

Introspection complicates the evidence. Two people may genuinely have different experiences, but they may also apply different standards to words such as see, hear, think and remember. One may reserve “seeing” for something close to perception; another may use it for the faintest visual impression. Research must therefore distinguish between differences in cognitive processing, differences in conscious access and differences in how people describe fleeting mental events.

Even with that caution, the variation is difficult to dismiss. We know that other people think because of what they say and do. We know much less about the form in which thought appears to them, so we fill the gap with ourselves.

Different minds may organise thought and memory in very different ways. Editorial image generated by the author.

Aphantasia and the Picture That Is Not There

The inability, or near inability, to voluntarily produce visual mental imagery is usually called aphantasia. At the opposite end of reported imagery lies hyperphantasia, in which imagined scenes can be exceptionally vivid. These terms describe useful extremes, but the territory between them is neither a single clean scale nor a division between imagination and its absence. Imagery may vary between senses, tasks and voluntary or involuntary situations. Some people who report little voluntary imagery also report visual dreams, although the relationship between dreaming and deliberate visualisation remains unsettled. A 2024 systematic review of aphantasia emphasises both the evidence for genuine variation and the remaining problems of definition and measurement.

Someone with aphantasia is not necessarily unable to imagine. They can invent characters, understand impossible worlds, anticipate consequences and construct situations that have never existed. What may be absent is one particular way of presenting those constructions to conscious awareness.

Ask two people how many windows were in the house where they grew up. One may mentally approach the front door, walk through each room and count the windows as they appear. Another may retrieve the layout as spatial knowledge or simply know that the living room had two windows, the kitchen one and the bedrooms one each. Both can reach the same answer, but one arrives through an internal scene while the other uses information that never becomes pictorial.

Ordinary language conceals the difference. We tell people to “picture the consequences”, “visualise success” or “see the scene” without establishing whether these are literal instructions, loose metaphors or something in between. A vivid visualiser may assume that the picture is doing the reasoning. Someone without imagery may regard mental pictures as optional additions to a process occurring elsewhere. Neither can infer the universal structure of thought from the way thought happens to present itself to them.

Even the division between represented and unrepresented information may be too simple. In one 2025 fMRI study, researchers could decode aspects of attempted visual imagery from early visual cortex in participants with validated aphantasia, although their neural patterns differed from those found in ordinary visual imagery. The result needs replication, but it suggests that relevant visual information may sometimes be present without becoming available as a conscious, perception-like picture.

More recent reviews have not resolved how that result should be interpreted. A 2026 review in Annual Review of Vision Science argues that congenital aphantasia may often reflect impaired access to visual representations rather than their absence, while another 2026 review concludes that the available neurophysiological evidence better supports genuinely absent imagistic representations. The disagreement is a useful reminder that “no picture in consciousness” does not yet map neatly onto one agreed neural mechanism.

The apple may be represented without ever appearing.

Inner Speech Without a Voice

Inner speech produces a similar confusion. For some people, thought regularly arrives as language. They rehearse conversations, argue with themselves, comment on what they are doing and compose sentences before speaking them aloud. The experience may resemble a voice, or it may feel more like silent articulation without actual sound.

For others, verbal thought is intermittent. Words appear while they are writing, reading or deliberately reasoning through a difficult problem, but there is no continuous commentator following them through the day. Some people report almost no inner voice at all.

The proposed term anendophasia describes very low or absent inner speech. A 2024 study of people reporting little inner speech found differences on some verbal working-memory and rhyme tasks. The term remains provisional, however. A 2025 critique argued that the experiments demonstrated differences in reported frequency rather than proving that some people experience no inner speech under any circumstances. A 2026 commentary pushed back in the other direction, suggesting that completely absent inner speech may be difficult to establish experimentally but that mostly anendophasic individuals probably do exist. The disagreement is therefore increasingly about measurement as well as terminology.

The dispute partly reflects how difficult the phenomenon is to define. Thinking in words is not necessarily the same as hearing words. A person may know the sentence they are forming without experiencing a voice pronouncing it. A thought may be linguistically structured while remaining abbreviated, fragmentary or barely sensory. Even people with frequent inner speech probably do not carry a polished transcript of everything passing through their minds.

Congenitally deaf signers make the separation between language and sound especially clear. Profound deafness does not prevent the development of an internal linguistic life. A small PET study of inner signing found that thinking sentences in sign language recruited a left frontal language region also involved when hearing people silently articulate sentences. Deaf signers may also sign visibly to themselves while remembering, planning or regulating their behaviour—the signed equivalent of talking under one’s breath—as documented in a later study of visible private signing.

An internal monologue therefore does not require an audible voice, or even a history of hearing voices. It may be signed, verbally structured without sound, represented partly through movement or compressed into meanings that never arrive as complete sentences.

This weakens the tempting equation between inner narration and self-awareness. A constantly talking mind may be reflective, but it may also be repetitive, anxious or occupied with explanations produced after a decision has begun to form. A quieter mind is not necessarily empty. It may work through spatial relationships, bodily expectations, emotional evaluations or conceptual conclusions that never become verbal. The statement “I thought about it” identifies an activity while leaving its conscious form almost entirely unspecified.

Autobiographical Memory and the Developing Narrator

Memory produces an even more personal version of the problem. We commonly speak as though remembering means reopening a stored scene, yet memory combines several abilities that usually cooperate closely enough to appear singular. A person may know that an event occurred without mentally returning to it. They may remember where they lived, which school they attended and what happened during a family holiday while possessing little sensory or emotional re-experience of any particular episode.

This distinction is especially pronounced in severely deficient autobiographical memory, or SDAM. In the original description of SDAM, researchers examined three healthy, high-functioning adults with lifelong difficulty reliving personal events despite otherwise preserved cognitive ability. Their histories survived largely as information rather than as recoverable first-person scenes. SDAM is better treated here as a proposed extreme of autobiographical-memory variation than as a conventional diagnosis with settled boundaries.

“I went to Italy when I was ten” can therefore refer to different mental acts. One person may reconstruct the hotel corridor, the heat outside, the breakfast room and the feeling of entering the sea. Another may know that Italy belongs in the chronology of their life much as a historical date belongs in a textbook. Most people probably occupy less dramatic positions between those extremes, retaining some mixture of scenes, emotions, bodily sensations and factual narrative.

Childhood amnesia makes this strangeness universal. Every adult has lived through years of attachment, fear, learning, frustration and discovery that they can no longer retrieve as ordinary autobiographical episodes. Young children demonstrably remember events for a time, but many early memories later become inaccessible. In a prospective study of childhood amnesia, children could initially describe experiences from around age three that were increasingly lost over subsequent years.

There is no single accepted explanation. Childhood amnesia probably reflects several interacting developments: rapid forgetting during early childhood, the maturation and reorganisation of memory networks, expanding language, a better grasp of time and causality, and the gradual construction of a self capable of treating events as parts of a continuing personal history. Nelson and Fivush’s social-cultural developmental account of autobiographical memory places particular emphasis on the interaction between memory, language, self-understanding and conversations about the past.

This helps explain stories from people who remember the moment they “started thinking”. Taken literally, the claim is implausible. Before that scene, the child had already recognised people, anticipated events, pursued goals and learned patterns. What may have become noticeable was something narrower: inner speech, deliberate reflection, autobiographical narration or awareness of thought as an object that could itself be examined. The first surviving memory of self-conscious thought can easily be mistaken for the beginning of thought.

Adults often imagine young children as reduced versions of themselves: similar internal lives with fewer words and less information. Early cognition may instead be organised differently. A toddler can recognise that a parent has left, anticipate separation and become distressed without constructing an adult-style sentence explaining the situation. Memory, prediction and interpretation can guide behaviour without taking a narratable verbal form.

During the preschool years, children often talk themselves through difficult activities. They name objects, issue instructions, reject failed attempts and describe what should happen next. Research on preschool private speech has documented overt, whispered and partly internalised forms of this self-directed language, with patterns varying across age and task. Developmental theories commonly treat this as one route through which socially acquired language becomes a tool for planning and self-regulation.

Language does not create thought in a previously vacant mind. It reorganises capacities already present. It allows a child to preserve instructions in a stable form, compare alternatives explicitly and turn an experience into a story that can be rehearsed with other people.

A parent asks where they went, who was there, what happened next and how the child felt. Such conversations do more than strengthen recall. They teach the child how an autobiographical memory is structured. An event acquires participants, sequence, causes and a place in the history of a particular person. The child gradually becomes not only someone to whom things happen but someone who can narrate the life of the person to whom they happened.

From the far side of childhood, that development may resemble an awakening. Memory preserves a few scenes and discards much of the transition between them. Later reflection turns one vivid moment into a border: before it, darkness; after it, a recognisable self.

But forgetting an experience does not mean that no one was there to have it.

Anosognosia and the Limits of Self-Knowledge

Aphantasia, unusual inner speech and sparse autobiographical recollection concern variations found in otherwise ordinary lives. Neurological injury reveals more dramatic separations between abilities that normally cooperate. These conditions are not direct models of aphantasia or quiet inner experience. Their relevance is narrower: they show that capacities which feel indivisible can depend on separable systems.

In anosognosia, a person may fail to recognise an impairment caused by neurological illness or injury. Someone with paralysis can insist that the affected limb functions normally or produce an explanation for why they are not moving it at that moment. This is not simply a refusal to accept unpleasant information. The person’s ability to register a failure and incorporate it into an updated account of themselves has itself been disrupted.

No single mechanism explains every case. One influential account places part of the failure in systems that compare intended movement with actual sensory feedback. When the discrepancy is not registered or incorporated correctly, the person’s model of their own ability remains unchanged. The competing mechanisms and clinical variations are discussed in a review of motor awareness in anosognosia.

The condition exposes a severe version of a more general limitation. A brain can fail to perform an action and also fail to represent that failure accurately to itself. Introspection does not stand outside cognition as an independent observer. It is another capacity produced by the same system, and it can be incomplete, selective or mistaken.

Why We Mistake Our Own Mind for the Standard

There is a seductive idea that each person is uniquely qualified to understand their own mind. No one else has direct access to our thoughts, so it seems natural to treat introspection as privileged evidence.

It is privileged evidence about what an experience feels like. It is much weaker evidence about how that experience was produced. We may see the apple, hear the sentence or recover the memory, but we do not observe how the brain constructed the image, selected the words or decided that a fragment belonged to our personal past. Much of the relevant processing has already occurred before anything becomes available for description.

Introspection gives us something like an interface view: genuine access to certain states and operations, but not a transparent account of how they were assembled. The analogy has limits. Conscious pictures and words are not necessarily decorative outputs; they can participate in planning, rehearsal and self-regulation. The point is not that consciousness merely displays cognition, but that its visible contents do not provide a complete diagram of cognition.

An internal explanation may report a decision rather than have created it. A mental picture may display a possibility assembled through other processes. A feeling of familiarity can arise without the episode that would normally justify it. Conscious experience is active and consequential, but it remains selective.

This helps explain why people can misunderstand one another while speaking apparently clear psychological language. A vivid visualiser may regard people without imagery as lacking something essential to creativity. Someone with constant inner speech may find thought without words almost impossible to conceive. A person with rich autobiographical recall may assume that everyone can revisit childhood in scenes, while someone whose past survives mostly as facts may suspect that such descriptions are embellished.

Each person takes a private interface and mistakes it for the architecture of the human mind.

Ordinary life does little to correct that mistake because it tests results rather than experiences. Can you recognise the person, solve the problem, describe the room, remember what happened or imagine an alternative? If the answer is yes, we rarely ask what accompanied the process internally.

That may be why discoveries about aphantasia and inner speech provoke such astonishment. The difference was present throughout the person’s life, but nothing forced it into view. Friends could discuss books, memories and plans for decades while assuming that words such as picture, hear, remember and imagine referred to equivalent experiences.

The differences should not be romanticised. Some may create practical disadvantages, and a sudden loss of imagery, memory or self-awareness can indicate neurological illness. Nor should every variation in wording be promoted into a distinct condition. Introspection is difficult, and scientific labels can make uncertain boundaries appear cleaner than they are.

Still, the central problem remains. Some people think with pictures vivid enough to examine; others understand without seeing. Some conduct long internal conversations; others reach conclusions in relative silence. Some revisit the past through scenes; others know their history without travelling back into it. Children think before they can narrate thought, and adults continue to rely on cognition that never enters the story they tell about themselves.

The strangest possibility is not that a minority of people possess unusual minds. It is that every mind may be unusual, and that most of the differences remain hidden behind our ability to speak as though we mean the same thing.