Abstract
In the last six or seven years, aphantasia has received attention from media outlets, television shows, and social networks. This alleged condition, however, has hardly been discussed in the philosophy of mind. In this paper, I assess some of the research conducted in cognitive science and provide, for the first time in the literature, a comprehensive assessment of possible explanations for aphantasia. Specifically, the hypotheses I submit for consideration ascribe the reports of absence of visual imagery to (i) a discrepancy at the level of concepts, (ii) a failure of attentional mechanisms that modulate introspection, (iii) a lack of personal-level access to sub-personal imagistic representations, and (iv) an absence of sub-personal imagistic representations. I conclude that hypotheses (i) and (ii) can be rejected while hypotheses (iii) and (iv) can be accepted as defensible candidates for explaining aphantasia, although the latter is better suited to account for the available evidence in both comparative and absolute terms. Finally, I present some educated guesses and empirical research that could shed further light on the study of this condition.
What This Study Is About
This research explores the "why" behind aphantasia—a condition where people cannot create mental imagery (the ability to picture things in your mind). The researcher looked at different theories to figure out if the "blind mind’s eye" is caused by a hardware issue in the brain or just a different way of describing thoughts.
How They Studied It
This wasn't a lab experiment with new volunteers. Instead, the author acted like a scientific detective, reviewing years of existing studies. He analyzed data from hundreds of participants—both aphantasics and "visualizers"—who had taken part in brain scans, memory tests, and even "pupil tests" (measuring how eyes react to imagined light). He used this evidence to test four major theories about how the mind works.
What They Found
The researcher ruled out the idea that people with aphantasia are just "describing things differently" or simply failing to notice their own mental images.
Instead, the study found that aphantasia is likely a deep-seated difference in how the brain processes information. The most supported theory is the "Absence" hypothesis: the idea that the brain simply doesn't create the visual "files" that most people see. He found that:
- Physical reactions don't lie: When most people imagine a bright sun, their pupils shrink. People with aphantasia don't have this reaction, proving their brains aren't "seeing" the light, even subconsciously.
- Memory works differently: People with aphantasia often struggle more with "autobiographical memory" (remembering their own life like a movie), but they are just as good at facts and logic.
What This Might Mean
This suggests that aphantasia isn't a "broken" system, but a different cognitive setup. It suggests that the brain can perform complex tasks—like designing a building or navigating a city—without needing a "mental projector."
However, because this is a philosophical review of other people's work, it doesn't "prove" one single cause for everyone. It "suggests" that for the majority of aphantasics, the mental screen is simply turned off, rather than just being disconnected from their awareness.
One Interesting Detail
The study notes that many people with aphantasia are successful architects and artists! Even without a "mind's eye," they use alternative "spatial" strategies to understand where objects are in a room, proving there is more than one way for a brain to be brilliant.