When Personality Tests are Useless for Hiring and When They're Mandatory

I’ve long contended that personality style tests like Predictive Index, DISC and Myers-Briggs are inappropriate for screening candidates in or out before they’re interviewed. The problem is that these tests measure preferences, not competencies. More important, most people can modify their preferred style to meet the needs of the situation, something not even considered by these types of questionnaires. As a result, there are just too many false positives and false negatives to make these types of tests good enough for filtering candidates early in the hiring process.