Psychology says people who grew up working class aren't less capable than their higher-class peers in job interviews — they're simply less overconfident, and overconfidence is what interviewers keep mistaking for competence

June 30, 2026 - 00:15

Job interviews are supposed to measure competence. A 2020 paper in the Journal of Personality and Social Psychology suggests they often measure something else entirely: overconfidence. The research indicates that people who grew up working class are not less capable than their higher-class peers. They are simply less overconfident. And interviewers keep mistaking that overconfidence for real ability.

The study, led by researchers at the University of California, Berkeley, tracked hundreds of job seekers and hiring managers. They found that candidates from higher-class backgrounds tended to speak with more certainty, use more assertive body language, and present themselves as more self-assured. These behaviors were consistently rated by interviewers as signs of higher competence. In reality, objective tests of cognitive ability and job skills showed no meaningful difference between the two groups.

The problem is a mismatch between perception and reality. Interviewers are often drawn to confidence because it feels like a signal of leadership and decisiveness. But confidence is not the same as skill. The researchers argue that this bias systematically disadvantages capable candidates who are simply more honest about their own limits. Working-class applicants, who are often taught to be humble and to avoid bragging, end up penalized for their modesty.

The findings raise serious questions about the fairness of the traditional interview process. If hiring decisions are driven by how confident someone sounds rather than what they can actually do, companies are likely passing over strong candidates in favor of louder ones. The authors suggest that structured interviews, blind evaluations, and skill-based tests might do a better job of finding the best person for the job. Until then, the quiet candidate in the corner might be the best hire you never made.