I think Ganzflicker is something similar. Article and discussion: Simple test reveals if your mental images are more vivid than other people's (sciencealert.c

I think Ganzflicker is something similar. Article and discussion: Simple test reveals if your mental images are more vivid than other people's (sciencealert.com) 177 points by smusamashah on June 28, 2021 | 146 comments https://news.ycombinator.com/item?id=27669211 https://news.ycombinator.com/item?id=27669211 Link to online tool (warning: it starts flickering as soon as the page loads): https://kerblooee.github.io/ganzflicker/ https://kerblooee.github.io/ganzflicker/