Right-wing podcaster Stefan Molyneux recently advised his teenage fans that they should append their IQ scores to job applications. This idea was widely and deservedly ridiculed on Twitter. It’s a serious faux pas to include test scores of any kind — IQ especially, but also SAT or graduate admissions tests like LSAT, MCAT or GMAT — on a resume.  Including test scores will cause many employers to draw negative assumptions about an applicant, and thus reduce the applicant’s chances of being hired, regardless of how good the scores are. But why is there such a taboo against sharing scores, that including them on a resume would cause an employer to draw negative inferences about an applicant’s character? Why is it considered extreme and risible to suggest that a job candidate with a high IQ or a high SAT score should treat that as a qualification? And who benefits from this norm of keeping this data secret? Proxies for aptitude While it is bad advice for a job applicant to share test scores with an employer, nearly every …