Ishihara

We are going to investigate colour vision so a first experiment is to give ourselves a colour blindness test. The standard test is the Ishihara Test with 38 cards. If we are lucky, we will have a colour blind person in the group and can compare their responses with other peoples!
Here is a link to an online test so you can test yourself (note that this is not a reliable diagnostic approach as screen display of colours can vary, but it should identify if you are completely colour blind!)

Can you see the coloured number?

Ha ha! That one is in black and white so as not to be unfair to colour blind people :)

We tried the real test and here are our results:

Hmm... what does it all mean? There are some indications that student 5 may have colour deficiency, and that possibly student 2 has discalculia (!) and that most of us weren't sure how to describe the test cards that had sxquiggly lines on... We can do some analysis on the spreadsheet but probably more interesting just to go back to those that had anomalous answers and check what they see!