13 Studies have found that people find symmetrical faces more attractive than faces that are not symmetrical To test this theory a psychiatrist selected a random sam ple of people and showed them pictures of three different faces a face that is per fectly symmetrical a face that is slightly asymmetrical and a face that is highly asymmetrical She then asked them to rate the three faces in terms of their attrac tiveness on a scale from 1 to 7 with 7 being the most attractive a Test the null hypothesis that attractiveness does not differ with facial sym metry Symmetrical 6 7 5 6 6 Slightly Asymmet Highly Asymmet rical rical 5 4 5 2 4 5 I 2 3 1 1 22