1. Fairness in rating performance and interpreting performance appraisals requires that
managers understand the kinds of distortion that commonly occur.
A. Types of Rating Errors
1. Several kinds of errors and biases commonly influence performance
measurements.
2. Similar to Me: A common human tendency is to give a higher evaluation to people
we consider similar to ourselves. This is called the similar-to-me error. One
unfortunate result of this type of error is possible discrimination.
3. Contrast: Sometimes, instead of comparing an individual’s performance against an
objective standard, the rater compares that individual with other employees.
4. Errors in Distribution: Raters often tend to use only one part of a rating scale.
When a rater inaccurately assigns high ratings to all employees, the resulting error
is called leniency. When the rater incorrectly gives low ratings to all employees,
this error is called strictness. Rating all employees in the middle of the scale is
called central tendency.
5. Theses errors pose two problems: (1) they make it difficult to distinguish among
employees rated by the same person and (2) create problems in comparing the
performance of individuals rated by different raters.
6. Halo and Horns: Another common problem is that raters often fail to distinguish
among different aspects of performance. When the rater reacts to one positive
performance aspect by rating the employee positively in all areas of performance,
the bias is called the halo error. When the rater responds to one negative aspect
by rating an employee low in other aspects, the bias is called the horns error.
7. When raters make halo and horns errors, the performance measurement cannot
provide the specific information needed for useful feedback.
B. Ways to Reduce Errors
1. Providing training for raters can reduce rating errors.
C. Political Behavior in Performance Appraisals
1. Sometimes the people rating performance distort an evaluation on purpose, to
advance their personal goals. This kind of appraisal politics is unhealthy because
the resulting feedback does not focus on helping employees contribute to the
organization’s goals.
2. Several characteristics of appraisal systems and company culture tend to
encourage appraisal politics. Appraisal politics are most likely to occur: (1) when
raters are accountable to the employee being rated, (2) the goals of rating are not
compatible with one another, (3) the performance appraisal is directly linked to
highly desirable rewards, (4) when top executives tolerate or ignore distorted
ratings, and (5) senior employees tell newcomers company folklore that includes
stories about distorted ratings.
3. Political behavior occurs in every organization. However, organizations can
minimize appraisal politics by establishing an appraisal system that is fair. Some
ways to promote fairness include: (1) hold a calibration meeting, in which
managers discuss employee performance ratings and provide evidence supporting
their ratings, (2) use consistent standards for evaluating different employees, (3)