|  | Range | M | D. Std. | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Self-Report measures | 1. Workload | 1-4 | 2.59 | .75 | 1 | Â | Â | Â | Â | Â | Â | Â |
 | 2. Boredom | 1-5 | 2.71 | .90 | .17 | 1 |  |  |  |  |  |  |
 | 3. Customer relationship management | 1-5 | 2.41 | .94 | .21* | .42** | 1 |  |  |  |  |  |
 | 4. Psychological health | 0-3 | 0.92 | .55 | .06 | .46** | .50** | 1 |  |  |  |  |
 | 5. Emotional exhaustion | 0-6 | 2.80 | 1.63 | .35** | .56** | .66** | .60** | 1 |  |  |  |
Objective measures | 6. Workload (number of customers served) | 0-37 | 12.42 | 7.62 | -.02 | .06 | .15 | -.03 | .13 | 1 | Â | Â |
 | 7. Boredom (variety of tasks) | 2-14 | 5.91 | 2.49 | .09 | -.07 | -.18 | -.11 | -.25** | .37** | 1 |  |
 | 8. Customer relationship management (customer queue) | 0-6 | 1.70 | 1.29 | .00 | .02 | .27** | .26** | .25** | .41** | -.15 | 1 |