The graphic rating scale, a behavioral method, is perhaps the most popular choice for performance evaluations. This type of evaluation lists traits required for the job and asks the source to rate the individual on each attribute. A discrete scale is one that shows a number of different points. The ratings can include a scale of 1–10; excellent, average, or poor; or meets, exceeds, or doesn’t meet expectations, for example. Acontinuous scale shows a scale and the manager puts a mark on the continuum scale that best represents the employee’s performance. For example:
Poor |
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Excellent |
The disadvantage of this type of scale is the subjectivity that can occur. This type of scale focuses on behavioral traits and is not specific enough to some jobs. Development of specific criteria can save an organization in legal costs. For example, in Thomas v. IBM, IBM was able to successfully defend accusations of age discrimination because of the objective criteria the employee (Thomas) had been rated on.
Many organizations use a graphic rating scale in conjunction with other appraisal methods to further solidify the tool’s validity. For example, some organizations use a mixed standard scale, which is similar to a graphic rating scale. This scale includes a series of mixed statements representing excellent, average, and poor performance, and the manager is asked to rate a “+” (performance is better than stated), “0” (performance is at stated level), or “−” (performance is below stated level). Mixed standard statements might include the following:
- The employee gets along with most coworkers and has had only a few interpersonal issues.
- This employee takes initiative.
- The employee consistently turns in below-average work.
- The employee always meets established deadlines.
An example of a graphic rating scale is shown in Figure 11.1.
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