Matthew Horwood/Stringer via Getty Images Picture a bright red apple. Most people can do this easily. They imagine the apple’s shape, colour and shine. But for others, the image is vague and blurry or they “see” nothing at all. This is known as aphantasia – a “blind mind’s eye”. What we are dealing with here are individual differences in mental imagery. Research suggests mental imagery exists on a continuum, and this can impact how we learn. Every day in class, students are encouraged to “visual