Some people can't see mental images

I’ve read tons of these and still have no idea if I have aphantasia or not. I can’t understand whether people just have different ways of describing what’s in their minds eye or if there’s really a fundamental difference.

Yep. Problem is that there's actually a spectrum of vividity of mental imagery, but in popular discussion it's always seen as a binary on/off thing.

An old post by Scott Alexander (16+ years, mind blown) discusses this, long before the term "aphantasia" became a thing [1]. There was a debate about what "imagination" actually means already in the late 1800s; some people were absolutely certain that it was just a metaphor and nobody actually "sees" things in their mind; others were vehement that mental images are just as real as those perceived with our eyes. The controversy was resolved by Francis Galton, who did some rigorous interviewing and showed that it really does vary a lot from person to person.

[1] https://www.lesswrong.com/posts/baTWMegR42PAsH9qJ/generalizi...

In Russia, color-blindness is referred to as Daltonism, and I figured Francis must have been the one to be the source of that (given this topic), but apparently it was John Dalton: https://en.wikipedia.org/wiki/John_Dalton

I haven’t heard of Galtonism. From my experience as the colorblind child of native Russian speakers, it’s Daltonism (дальтони́зм).

https://en.openrussian.org/en/colour-blind

Good lord, I had both of their wiki pages open, and STILL somehow D and G were the same letter in my mind.

I should just delete my comment, but let it stand as a monument to my goof.