Horizontal stripes aren't bad after all!

July 19, 2017

If you're trying to look slimmer in an outfit, you certainly shouldn't wear horizontal stripes- right? An optical illusion created by Hermann von Helmholtz in 1867 shows two squares of black and white stripes, one with stripes going horizontally, and one with stripes going vertically. Weirdly, the hotizontally striped square looks taller and the vertically striped square appears wider. In 2011, psychologists at the University of York in England tested whether the illusion seen in the 2-D version was also true in 3-D. Two idential female mannequins wore either horizontal or vertical striped outfits. The team found that the figure sporting the vertical stripes appeared wider; in fact, the one donning horizontal stripes would need to be 10.7 percent broader for the two to visually match up. It seems science trumps fashion sense this time!

Source: PopSci