"People have an inherent evolutionary bias of favoring members of their own group and accent is one way we can quickly decide if someone is different ", says Marc Pell, director of the School of communication Sciences and Disorders at McGill University. Pell and his colleagues recently explored the accent bias and concluded that participants perceived the accented speakers as less believable – unless they had an especially confident tone.
Displaying confidence may be an effective way to offset the prejudice prompted by an accent.
Source: Phycology Today | March/April 2019