There is a common belief that hair parted on the right side makes a person appear more feminine and warmer, while parts on the left give the impression of greater masculinity and competence. Researchers tested this assumption across three studies with a total of 3,819 participants, using digitally altered photos that kept every aspect of a person’s picture the same, except for the hair style. In all studies, hair part location did not significantly influence perceptions of appearance. This was true for both women and men, and for a variety of expressions (e.g., neutral, smiling). Ultimately it appears that how you part your hair does not have a meaningful influence on your appearance.
Frimer, J. A. (2018). Does the left hair part look better (or worse) than the right? Social Psychological and Personality Science. Online first March 23, 2018. doi.org/10.1177/1948550618762500