Free online tests - not that accurate Posted by Jake-san | at 5:04 PM

I used a free Ishihara Test for Colour Blindness today... Just for the
fun of it. Well, I was really surprised of the outcome. The test
insisted that I got a 80% score, and that I had green-red blindness.
Image what shock I was in, since I always thought there was nothing
wrong in that department.
I had a strong doubt though, that the test was somehow fucked up. I made
a google search on Ishihara Test, and found all pictures used in the
free test, and compared the answer keys provided with that I had entered
as the answer. After cross-checking these differences I found why I got
a poor result.. Two of the pictures on the test were entered correct by
me, but the test flagged them as wrong. The person that made the test
must have accidentally copy-pasted the code poorly and was checking in
the 2 pictures the value entered for the first picture.
Sounds like an error I might have done my self, but still... Lucky I
dodged that bullet after all :-D