It’s been a few years, but the answer is now—yes.
Here’s a link to a New Scientist article from earlier this year. I’m afraid there’s a pay barrier: https://www.newscientist.com/article/2083706-my-minds-eye-is-blind-so-whats-going-on-in-my-brain/
The article documents recent experiments and thinking about people who are poor or incapable (about 2 to 3% report this) of forming mental pictures (as opposed to manipulating concepts).
Key quote:
To find out how MX’s brain worked, Zeman put him into an MRI scanner and showed him pictures of people he was likely to recognise, including former UK prime minister Tony Blair. The visual areas towards the back of his brain lit up in distinctive patterns as expected. However, when MX was asked to picture Blair’s face in his mind’s eye, those areas were silent. In other words, the visual circuits worked when they had a signal from the outside world, but MX couldn’t switch them on at will (Neuropsychologia, vol 48, p 145).
It’s been a few years, but the answer is now—yes. Here’s a link to a New Scientist article from earlier this year. I’m afraid there’s a pay barrier: https://www.newscientist.com/article/2083706-my-minds-eye-is-blind-so-whats-going-on-in-my-brain/ The article documents recent experiments and thinking about people who are poor or incapable (about 2 to 3% report this) of forming mental pictures (as opposed to manipulating concepts). Key quote:
Test yourself here: http://socrates.berkeley.edu/~kihlstrm/MarksVVIQ.htm