'Social camouflage' can be used by people with untrustworthy faces to override the default impression others form by looking at their face. Here, the facial movements required to look more or less dom

Dr Gill said that there are also basic facial movements people identify with specific social traits - such as trustworthiness (pictured - and these movements can override the default impression people

"Attractiveness is harder to feign, according to the study. This is because the perception of attractiveness is based on many more factors than just facial expressions, Dr Gill explained"