What Having No Inner Voice - Anendophasia - Taught Me About Consciousness
It was over dinner, in the past year or so, with the world-famous neuroscientist Mark Solms - a man who has spent his career mapping the deep architecture of conscious experience - that I first heard the word. I’d been explaining, as I often do at dinner tables, that I don’t have a voice in my head. No narrator. No internal monologue running commentary on my life. Mark paused, smiled, and said: “That’s called anendophasia.”1
I remember thinking - well, not thinking in words, more like a sudden crystallisation of feeling - that it was both a relief and slightly absurd to finally have a clinical-sounding label for something I’d spent decades not quite being able to explain. Because here’s the first thing you need to know about anendophasia: saying “I have anendophasia” is inherently misleading. It sounds like I’ve caught something. Like there’s a pathogen involved. But anendophasia isn’t the presence of a condition - it’s the absence of an experience. I don’t have anendophasia the way you might have a cold. I lack something that most people apparently have and take entirely for granted: an inner voice.
And that distinction - between having something and lacking something you never knew existed - turns out to be one of the most illuminating lenses through which to understand what consciousness actually is.
My favourite dinner party trick
I should confess: anendophasia has become my favourite dinner table conversation. Not because I enjoy the shock value - although the shock value is genuinely extraordinary - but because it consistently cracks open something profound about how we assume other minds work.
Here’s how it usually goes. I’ll mention, casually, that I don’t have an inner monologue. That when I think, there are no words. No voice narrating my experience. And the table splits. Half the people stare at me as though I’ve just told them I don’t have a skeleton. The other half - the quiet ones - suddenly light up with recognition: “Wait, what do you mean by inner voice?”
The revelation goes both directions. People with rich inner monologues cannot fathom navigating life without one. And people without one - people like me - are stunned to discover that some people are literally talking to themselves all day long. Both sides leave the conversation fundamentally unsure whether anyone else experiences reality the way they do.
This, incidentally, is one of the deepest problems in consciousness research. And you can reproduce it at any dinner table with a bottle of wine and a single question.
Decades of clues
I didn’t discover I was different until my mid-thirties. In retrospect, the clues were everywhere - I just lacked the conceptual framework to recognise them.
There were the films, for a start. Every movie with a voiceover - every protagonist narrating their inner life - I assumed was a storytelling device. A cinematic convention, like a soundtrack. It never occurred to me that it was depicting something people actually experience.
There were conversations that didn’t quite land. People would say things like “I was arguing with myself about whether to take the job” and I’d interpret it metaphorically. Of course they weren’t literally arguing with themselves. Were they?
And then there was the falling out. In my early twenties, I had a close friend who accused me of being “holier-than-thou.” The argument started because I’d said, honestly, that I don’t consciously form judgments about people. That when I meet someone, I don’t have an internal voice constructing assessments and opinions. He thought I was lying - performing some kind of elevated moral stance to make him feel inferior. It nearly ended the friendship. He simply couldn’t conceive that someone could meet another person without their mind generating a running verbal evaluation. For him, that voice was thinking. Without it, what was left?
It took me another decade to understand that he wasn’t being unreasonable. He was experiencing a genuinely different kind of mind. And in a way, so was I - I’d always assumed his talk of “arguing with himself” was just a figure of speech. The incomprehension was perfectly symmetrical.
What people tell me it’s like
When I ask people to describe their inner monologue, the answers are remarkable in their vividness. They describe a voice - usually their own, sometimes slightly different, sometimes many - that narrates their experience in real time. It comments on what they’re seeing. It rehearses conversations. It replays arguments with better comebacks. It worries about the future in complete sentences. It reads along when they read. Some people tell me it never stops.
The neuroscience broadly supports this. Russell Hurlburt, a psychologist at UNLV who has spent decades using a method called Descriptive Experience Sampling - where participants carry a beeper and record what’s in their mind at random moments - found that inner speech occurs in roughly a quarter of sampled moments on average.2 But the variation is enormous: in some individuals it occurs as high as 94% of the time, while others never experience it at all.
The 2024 study by Johanne Nedergaard and Gary Lupyan that formally coined the term “anendophasia” found that a meaningful minority of people report little to no inner speech.3 When they tested these individuals, the results were telling: people without inner speech performed worse on verbal working memory tasks and rhyme judgments, but - and this is crucial - when they were allowed to speak words aloud, the gap disappeared. The voice isn’t missing from their cognition. It was never internalised.
What it’s like from the inside
So what is it like to think without words?
The honest answer is: I don’t know how to describe it in a way that will satisfy someone who thinks in language, because the description itself requires the very medium I lack. It’s a bit like asking someone who has never seen colour to describe what they see instead. They don’t see instead. They just see.
For me, thinking is more like… weather. Thoughts arrive as shifts in an internal landscape - a tightening here, an opening there, a sudden clarity that has shape and texture but no phonemes. When I need to make a decision, the answer often simply appears, fully formed, without any conscious deliberation I can point to. Jesse Koski, a Finn who also lacks inner speech, described his thoughts as “bubbles rising into consciousness” containing a combination of concepts, images, and feelings - but no words.4 That resonates deeply.
I should note: I can absolutely use language. I’m writing this, after all. But the process of turning thought into words is one of translation, not transcription. I’m not writing down what my inner voice is saying. I’m rendering something non-verbal into verbal form, and it takes effort. Sometimes quite a lot of effort.
A word about words: anendophasia vs. aphasia
The terminology is worth untangling, because the words look similar but describe fundamentally different things. Aphasia is an acquired neurological disorder - typically caused by stroke or brain injury - that impairs a person’s ability to produce or comprehend external language. People with aphasia have brain damage. They struggle to speak, read, or write.
Anendophasia involves no brain damage whatsoever. My external language works fine. I can speak, write, argue, joke, and give keynote speeches to thousands of people. What I lack is the internal experience of verbal thought. The prefix “an-” (without) + “endo-” (inner) + “phasia” (speech) is precise: without inner speech. It’s a variation in subjective experience, not a clinical impairment.
If anything, the existence of anendophasia poses a more interesting question than aphasia does - because it demonstrates that you can have a fully functioning language system externally while the internal experience is completely different. The hardware is the same. The subjective experience is not.
What this reveals about consciousness
Here’s where it gets interesting - and where my experience of anendophasia directly shaped my thinking about the nature of consciousness itself.
When I ask people what they think consciousness is, the answer I hear most often - from laypeople, from executives, from people at conferences - is some version of: “It’s the voice in my head.” Consciousness, for most people, is the inner monologue. It’s the narrator. The self that talks to the self.
But I don’t have that. And I’m indisputably conscious.
So either consciousness is the inner monologue and I’m some kind of philosophical zombie (I assure you I’m not), or - and this is the far more interesting possibility - the inner monologue is a feature of consciousness, not its foundation. A cognitive tool, not the operating system.
This insight led me somewhere profound. Because if consciousness isn’t narration, what is it?
Consciousness as prediction: the Spinning Wheel
My experience of “just being” - of existing in the world without a verbal narrator inserting itself between me and my experience - has been instrumental in developing what I call the Spinning Wheel theory of consciousness.
But first, let me explain why living without inner speech doesn’t just remove a feature - it reveals the machinery underneath. When you strip away the narration, what you’re left with is the raw, continuous process of your mind-body system doing what it was always doing beneath the words: predicting. Every moment, your brain is generating expectations about what will happen next - what you’ll see when you turn your head, what the next word in a sentence will be, what your colleague’s facial expression means. When those predictions are wrong, your brain updates. That cycle - predict, compare, adjust - is happening all the time, in everyone, whether they narrate it or not. Most people experience the narration and mistake it for the process itself. I experience the process directly, because the narration was never there.
This is the foundation of predictive processing, a framework pioneered by Karl Friston and elaborated by researchers like Anil Seth and Mark Solms.5 Your brain is not a passive receiver of sensory information. It is a prediction engine, constantly generating top-down hypotheses about what it expects to encounter and then updating those hypotheses when reality diverges from expectation. Seth calls perception a “controlled hallucination” - the brain hallucinating its model of the world, constrained by incoming sensory data. The most basic form of selfhood, as Seth and Tsakiris have argued, arises not from self-narration but from interoceptive inference - the body’s predictive models of its own internal states.6 Your sense of being a self begins with your heart rate, your gut, your breath - not with words.
And this is where the Spinning Wheel comes in. Think of a colour wheel. Each segment represents a different component of conscious experience - sensing, feeling, self-awareness, metacognition, temporal projection, embodied prediction. No single segment is consciousness. Combine them in motion and something emerges that isn’t present in any individual part. Stop the wheel, separate the segments, and consciousness disappears.
The inner monologue, in this framework, is one segment of the wheel. An important one for many people - it contributes to metacognition, self-regulation, and verbal reasoning. But it’s not the axle. It’s not what makes the wheel turn. What makes it turn is prediction - the continuous, embodied, pre-linguistic engagement with an uncertain world. Researchers have placed this kind of verbal, autobiographical narration at the top of what they call the predictive hierarchy7 - a high-level layer that shapes experience but is not its source. That’s what I’ve felt my entire life: the wheel spinning without one of its segments, and consciousness persisting regardless.
This is exactly what anendophasia feels like from the inside. Without a verbal narrator, what remains is the raw predictive machinery. The constant, wordless adjustment to an uncertain world. A kind of presence that meditators spend decades trying to achieve by quieting the very inner voice I never had.
The pros and the cons
Living without inner speech has genuine advantages. Without an internal voice, there’s no inner critic whispering judgments - about myself or about others. No verbal loop amplifying anxiety into a spiral of catastrophic self-talk. No rehearsal of arguments I’ll never have. Research suggests that the ratio of positive to negative inner self-talk in healthy individuals is roughly 1.6 to 18 - which means even well-adjusted people are talking themselves down about 40% of the time. I simply… don’t have that. When I meet people, I meet them without a running verbal assessment. My friend in my twenties thought this was a pose. It was just my architecture.
There’s also a natural presence that comes with it. I don’t have to meditate my way past internal chatter to arrive at the moment. I’m already there. The predictive machinery is running, but without the verbal layer that researchers have called the top of the predictive hierarchy - the autobiographical narration that most people experience as their default mode of consciousness.
But the disadvantages are real, and I won’t romanticise them. I struggle with the kind of sequential, logical, step-by-step reasoning that inner speech apparently facilitates. Working through a complex argument in my head - the way a lawyer might silently construct a case - is not available to me. The 2024 anendophasia study confirmed this empirically: people with low inner speech show measurable deficits in verbal working memory.3
What this looks like in practice: I’m in a boardroom, someone is building a multi-layered argument for why we should change strategy, and I can’t silently construct a counterargument in my head the way they can. I can’t rehearse the sentence before I say it. So I compensate. I write - constantly. I sketch structures on paper. I talk things through with other people, using them as external processing partners. In meetings, I’ll often ask someone to repeat a point not because I didn’t hear it, but because hearing it again gives the non-verbal understanding time to crystallise into something I can articulate. The thought is there - I can feel its shape - but wrestling it into words is an act of physical effort, like translating in real time from a language that has no dictionary.
There’s also a subtler cost. When people ask “what are you thinking?” the honest answer is often: I don’t know how to tell you. Not because I’m not thinking, but because the translation from non-verbal thought to language is lossy. Something is always left behind in the rendering.
What the quiet mind reveals
The formal study of anendophasia is still in its infancy - the term itself was only coined in 2024, and the empirical research is barely two years old. But the phenomenon it describes - and the questions it forces - are ancient.
What my silent mind has taught me, more than anything, is that consciousness is not what most people think it is. It is not the voice. It is not the narrator. It is not the story we tell ourselves about ourselves. Those things are features of consciousness - powerful, useful features - but they are not its foundation.
The foundation is deeper. It’s the continuous, embodied, predictive engagement with an uncertain world. It’s the spinning of the wheel. And it was there before the words, and it continues long after the words fall silent.
Notes and References
1 Nedergaard, J.S.K. and Lupyan, G. coined the term “anendophasia” formally in their 2024 paper (see note 3).
2 Heavey, C.L. and Hurlburt, R.T. ‘The phenomena of inner experience.’ Consciousness and Cognition, 17(3), 798–810, 2008. The 94% upper-range figure is documented in Hurlburt, R.T., et al. ‘Exploring the ecological validity of thinking on demand: Neural correlates of elicited vs. spontaneously occurring inner speech.’ Frontiers in Psychology, 7, 1279, 2016.
3 Nedergaard, J.S.K. and Lupyan, G. ‘Not Everybody Has an Inner Voice: Behavioral Consequences of Anendophasia.’ Psychological Science, 35(7), 780–797, 2024. DOI: 10.1177/09567976241243004. Published online 10 May 2024. The study selected participants from the bottom 16% of inner speech questionnaire scores (IRQ score below 3.5). The prevalence of near-zero inner speech in the broader population remains an open empirical question; figures of 5–10% cited in popular coverage derive from DES research rather than this paper specifically.
4 Koski, J., as described in BBC Science Focus, December 2025.
5 Friston, K. is Professor of Neuroscience at UCL and is widely credited with developing the free energy principle and predictive processing framework. Seth, A. and Solms, M. have both elaborated predictive processing accounts of consciousness. See Seth, A. Being You: A New Science of Consciousness. Faber & Faber, 2021. Solms, M. The Hidden Spring: A Journey to the Source of Consciousness. Profile Books, 2021.
6 Seth, A. and Tsakiris, M. ‘Being a Beast Machine: The Somatic Basis of Selfhood.’ Trends in Cognitive Sciences, 22(11), 969–981, 2018. PMID: 30224233.
7 Laukkonen, R.E. and Slagter, H.A. ‘From many to (n)one: Meditation and the plasticity of the predictive mind.’ Neuroscience and Biobehavioral Reviews, 128, 199–217, 2021. The paper places autobiographical narration and thinking at the apex of the predictive hierarchy and discusses how meditative practice can suppress this layer.
8 Schwartz, R.M. and Garamoni, G.L. ‘Cognitive balance and psychopathology: Evaluation of an information processing model of positive and negative states of mind.’ Clinical Psychology Review, 9(3), 271–294, 1989. The 1.6:1 positive-to-negative ratio describes self-referent speech in psychologically healthy individuals. A 1.6:1 ratio equates to approximately 38% negative valence.
