henry copeland:

People in higher social class have an exaggerated belief that they are better than others: Overconfidence can be misinterpreted by others as greater competence, perpetuating social hierarchies, study says -- ScienceDaily

Applicants were also required to complete a psychological assessment that would be used to assess their credit worthiness. Part of that included a flashcard game, a cognitive test where participants are shown an image that goes away after they press a key and is replaced by a second image. They then have to determine whether the second image matches the first. After completing 20 trials, applicants were asked to indicate how they performed in comparison with others on a scale of 1 to 100. When the researchers compared the actual scores with applicants' predictions, they found that people with more education, more income and a higher perceived social class had an exaggerated belief that they would perform better than others, compared with their lower-class counterparts. Another two investigations involving more than 1,400 online participants found a similar association between social class and overconfidence. In one, the researchers gave participants a trivia test. Those from a higher social class thought that they did better than others; however, when the researchers examined actual performance, it was not the case. For the final investigation, the researchers recruited 236 undergraduate students, had each answer a 15-item trivia quiz and asked them to predict how they fared compared with others. They also asked them to rate their social class and for their families' income and their mothers' and fathers' education levels. A week later, the students were brought back to the lab for a videotaped mock hiring interview. More than 900 judges, recruited online, each watched one of the videos and rated their impression of the applicant's competence.
- www.sciencedaily.com