physical attractiveness to personal attraction. One finding was that people tend to attribute positive qualities such as intelligence, competence, and warmth to individuals who have a pleasing physical appearance. Physical attractiveness Physical attractiveness is the perception of the physical traits of an individual human person as pleasing or beautiful. It can include various implications, such as sexual attractiveness, cuteness, similarity and physique. Judgment of attractiveness of physical traits is partly universal to all human cultures, partly dependent on culture or society or time period, partly biological, and partly subjective and individual. According to a study determining the golden ratio for facial beauty, the most attractive face is one with average distances between facial features, and an average length and width of the face itself. Facial attractiveness, or beauty, can also be determined by symmetry. If a face is asymmetrical, this can indicate unhealthy genetic information. Therefore, if a face is symmetrical (see facial symmetry), healthy genetic information is implied. People will judge potential mates based on the physical expression of the genetic health, which is their apparent attractiveness. This supports the good genes theory, which indicates that attractiveness is seen as a way to ensure that offspring will have the healthiest genes and therefore the best chance of survival. Certain traits that indicate good genes (such as clear skin or facial symmetry) are seen as desirable when choosing a partner. Personality Studies have reported mixed findings on whether or not similarity in personality traits between people in interpersonal relationships (romantic, friendship, etc.) is necessary or essential for relationship satisfaction. This has been due to different types of research methodologies used to reach conclusions. It's argued that the previous lack of evidence that congruence in personality traits between two people is an important predictor for relationship satisfaction has been due to individuals making judgements of each other at a salient level (local group) rather than a global group comparison (reference-group effect). A 2014 study suggested that people who tend to portray positive personality traits such as kindness are typically seen as more attractive than people who portray negative personality traits. Similarity attraction effect The proverb "birds of a feather flock together" has been used to illustrate that similarity is a crucial determinant of interpersonal attraction. Studies about attraction indicate that people are strongly attracted to lookalikes in physical and social appearance. This similarity is in the broadest sense: similarity in bone-structure,