I have another example of the same principle. When we were selecting partners (when Hewitt Associates was a partnership), we'd ask all existing partners to appraise all the candidates they worked with. Invariably, their evaluation would be centered on their own strong traits; actuaries would evaluate a candidate on the accuracy and precision of his/her work, or salespeople would evaluate a candidate on his/her social skills. The best evaluators were partners who appreciated strengths they did not possess themselves.