readability experiment

mostly I just need to do this already so that I can say sad words to my friend randomous: umm it's not very good, since it's my first time, but I'd like to try anyway. I've designed a short not-entirely-controlled test on some typography parameters to try and collect data on readability of a paragraph. https://lumage.smilebasicsource.com/web/readability/lineheight?font-family=Roboto just um read over the samples of text and carefully select which you found most comfortable. if you participate and don't destroy it thanks

What is the last test? I don't think I can see a difference.

Color. It's very subtle. Maybe I should make it less so.

Not sure if it's just my computer, but I'm examining the texts by the pixels, and I see no difference.

test 1: line height. If you can't see it then you're probably blind test 2: font size. This one is pretty obvious. test 3: color. May be hard to see on some monitors

Not cramped together, average font size, and dark colors. That's basically what I picked.