FIGURE 16.1
Don’t Think About It There was a time when high-school employment correlated with lifetime success. This is no longer true. The surprise is that even wanting a full-time job (and the extra income it would bring) reduces achievement—or is it the other way around? The scores in the chart above are z-scores, or standard scores, which show the difference from the group average. A z-score of 2 is a dramatic difference; a z-score of 3 is extreme.