People who report synesthesia perform better at tasks such as counting 2's in a picture with 2's and 5's, owing to their different colours. https://en.wikipedi

People who report synesthesia perform better at tasks such as counting 2's in a picture with 2's and 5's, owing to their different colours. https://en.wikipedia.org/wiki/File:Synaesthesiatest.jpg https://en.wikipedia.org/wiki/File:Synaesthesiatest.jpg